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Compaq 4000N - page 1
Technical Refere nce Guide for Com paq De skpr o 4000N and 4000S Pe rs onal Co mpute rs ...
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Compaq 4000N - page 2
This har dco p y is de sig ned to b e plac ed into a s tandard 3-ring binde r. Pro v ide d b elo w is a title blo ck that ca n be co pie d and cu t o ut and plac ed into the s lip or tape d o n to the e dge o f the b inder. De sk pro 4000N and 4000S Pers onal C om puter s TRG ...
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Compaq 4000N - page 3
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 i NOTICE The inf o rmation in th is do c ume nt is sub je c t to change w ithou t notic e . COMPAQ COMPU TE R C ORPOR ATION SHALL NOT BE LIABL E FOR TE CHNICAL OR EDIT ORIAL ERR ORS OR OMISSIONS HEREIN; NOR FOR INCIDE NTAL OR CONSE ...
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Compaq 4000N - page 4
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 ii ...
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Compaq 4000N - page 5
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 iii TABLE O F CO NTEN TS CHAPTER 1 INT RO DUCT IO N ............................................................................................................. 1.1 AB OU T TH IS GU ID E ........................................... ...
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Compaq 4000N - page 6
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 iv CHA PTE R 4 SYS TEM SU P PO RT......................................................................................................... 4.1 IN TRO D U CTI ON....................................................................... ...
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Compaq 4000N - page 7
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 v 5.6 KEY B OAR D/P OI NTI NG D EVI CE IN TERF AC E ............................................................... 5-28 5.6.1 KEY B OAR D IN TERF AC E OP ER ATIO N .................................................................. ...
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Compaq 4000N - page 8
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 vi 8. 4 CLIENT MANAGEME NT SUPPOR T ................................................................................... 8- 5 8.4.1 SY S TEM I D ....................................................................................... ...
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Compaq 4000N - page 9
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 vi i C. 3 SCANNER DESC RIPT ION ................................................................................................. C-14 C. 3. 1 SCANNER OPERATI ON ..................................................................... ...
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Compaq 4000N - page 10
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 v iii LIST OF FIGURE S F IGURE 2–1. C OMPA Q D ESK PRO 4000S P ERSONAL C O M PU TER W ITH M ONIT OR ....................................... 2- 1 F IGU RE 2–2. C ABINET L AYOU T , F RONT V IEW ................................... ...
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Compaq 4000N - page 11
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 ix LIST O F TA BLES T ABLE 1–1. A CRONYMS AND A BBREVIA T IONS ....................................................................................... 1-3 T ABLE 2–1. A RCHITECT URA L C OMP ARIS ON ............................. ...
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Compaq 4000N - page 12
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 x T ABLE 5–12. S ERIAL I NTERFA CE C ONTROL R EGIS TERS ........................................................................ 5-17 T ABLE 5–13. P A RALLEL I NT ERFACE C ONFIGU RATION R EGIS TERS ............................. ...
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Compaq 4000N - page 13
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 1-1 Ch apt er 1 INTRODUCT ION 1. Chap t er 1 INTRODUCTI ON 1.1 AB O U T THIS G U IDE This guide prov ides te chn ical info rmation abo ut th e Compaq D es kpro 4000N and 4000S Pe r so n al Comp ute rs. This do cume nt in clud es info ...
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Compaq 4000N - page 14
Chapter 1 Introduction Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 1-2 1.2 NOTATIONAL CONVENTIONS 1.2.1 VALUES H e xade cimal v alues are indic ated b y th e lette r “h” fo llow in g an alph a-n umerical v alue. B in ar y v alue s are indicate d b y the le tte r “b ” f o llo w ing a v alue o f o ne ...
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Compaq 4000N - page 15
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 1-3 1.3 COM M ON ACRONYM S AND AB B REVIATIONS Tab le 1-1 lis ts the ac rony ms and abb r ev iations use d in th is guide . Table 1–1. Acro ny ms and Ab b rev iatio ns Table 1-1 . Acronyms and Abbreviations Acr onym/Abbr eviation D ...
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Compaq 4000N - page 16
Chapter 1 Introduction Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 1-4 Table 1-1 . Acronyms and Abbreviations Continued Acr onym/Abbr eviation D escript ion DIMM dual inline memory module DIN Deutc he Indus triNorm ( connec tor s tandard) DIP dual inline pack age DM A dir ect m em o r y acce ss dpi dots pe ...
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Compaq 4000N - page 17
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 1-5 Table 1-1 . Acronyms and Abbreviations Continued Acr onym/Abbr eviation D escript ion lb pound LCD liquid cr ys tal display LED light-emitting diode LIF low ins ertion for ce (s oc ket) LSI large s cale integr ation LSb / LSB leas ...
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Compaq 4000N - page 18
Chapter 1 Introduction Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 1-6 Table 1-1 . Acronyms and Abbreviations Continued Acr onym/Abbr eviation D escript ion SCS I sm al l com put er syste m i nte rf a ce SDR AM Sy nchronous Dy namic R AM SEC Single Edge- Connect or SEC AM sequent ial colour av ec memoir e ...
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Compaq 4000N - page 19
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-1 Ch apt er 2 SY STEM OVER VI EW 2. Cha p t er 2 SYS TEM OVERVIEW 2.1 INTRODUCTION Th e Compaq De skpro 4000N and 4000S Personal Computer s ar e b ased o n Penti um mi cr opr ocesso r s featur i n g MMX t echn ology an d d esi gn ed wit h a ...
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Compaq 4000N - page 20
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-2 2.2 FEATURES This se c tio n desc r ibe s the s tandard an d distinguis hin g fe atur es. 2.2.1 S TANDARD FEATURES The f o llo w in g standard f e atures are include d on all mo de ls: ♦ Pe n t iu m m i cr opr oce ssor wit h MMX ...
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Compaq 4000N - page 21
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-3 2.2.2 M ODEL DIFFERENCES Deskpro 4000N Deskpro 4000S PC I c o nnec to r : 1 1 (s h ar ed s lot) IS A c onnec tor: no n e 1 (s h ar ed s lot) OS installe d: Wi ndow s N T 4.0 Wi ndow s 95 Rem ot e boot s upport : Yes N o Dis kette driv e i ...
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Compaq 4000N - page 22
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-4 2.3 M ECHANICAL DESIGN This se ctio n illustrates the lay o ut us ed b y the f ormf acto r . In additio n, th is se ctio n in clu de s the lay o ut o f the sy s te m b o ard. 2.3.1 CAB INET LAYOUT Item Function 1 Power Switc h 2 Po ...
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Compaq 4000N - page 23
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-5 Item Function 1 AC Line I n Connect or 2 Line Voltage Selec t Sw itch 3 Univ ers al Serial Bus Interfac e port 1 4 Univ ers al Serial Bus Interfac e port 2 5 Parallel Int erface C onnect or 6 Serial Int erface C onnect or B 7 Serial Int e ...
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Compaq 4000N - page 24
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-6 2.3.2 CHAS S IS LAYOUT NOTES: [1] D esk pro 4000S only Figu re 2–4. C h a ssi s La yo ut, Top Vi ew Front Back Power Supply Drive Bays Sy stem B oard ISA C ombo Slot 1 [ 1 ] PCI Combo Slot 1 Slots On Riser Ca rd, Rear V iew ...
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Compaq 4000N - page 25
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-7 2.3.3 S YS TEM BO ARD LAYOUT Item Function 1 Gr aphics monitor c onnector ( J2) 2 Top, Mous e interfac e connec tor; B ottom, key board c onnect or (J 9) 3 NIC AUI c onnect or header (P 15) 4 NIC RJ -45 connec tor ( J5) 5 Serial inter fac ...
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Compaq 4000N - page 26
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-8 2.4 SYS TEM ARCHITECTURE Th e Co mpa q Deskpr o 4000N an d 4000S Persona l Computer s featur in g MMX techn ology ar e based on a Pen t i u m MXX m i cr opr oce ssor matched w ith a suppo r t chipse t that is co mplimentar y in des ...
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Compaq 4000N - page 27
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-9 NOTES: CD models only . [1] Des k pro 4000S only . Figu re 2–6. Compaq Deskpro 4000N an d 4000S Sy stem Archi t ecture, Blo ck diagr a m Micr oproces s or and Cac he Memory North Bridg e 64-Bit Ho st Bus South Bridg e 32-Bi t PCI Bus 0 ...
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Compaq 4000N - page 28
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-10 2.4.1 M ICROPROCESSOR Th e Compaq De skpro 4000N and 4000S Personal Computer s fe atur e the Pentium MMX micro proc es so r th at is b a ckw ar d-co mpatible w ith sof tware w r itten fo r x86-ty pe proc es so rs. Th e Pen t i u m ...
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Compaq 4000N - page 29
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-11 2.4.3 S UPPORT CHIPSET Table 2-2 show s th e chipsets used f or t h e De skpro 4000N and 4000S sy stems. Table 2–2. Support Ch ipsets Table 2-2 . Support Chips et s Function Component Hos t/PC I (Nor th) Bridge: Sy stem C ontroller Dat ...
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Compaq 4000N - page 30
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-12 2.4.6 UNIVERS AL SERIAL B US INTERFACE Tw o U n ive rsal Se r ial Bus (U SB ) po rts are includ ed , eac h pr ov iding a h igh spe ed interfac e f o r f uture sy ste ms and/or pe r ipherals. The U SB in terf ace o pe rates at 12 M ...
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Compaq 4000N - page 31
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-13 2.5 S PECIFICATIO NS This se ctio n in clud es the e nviro nmental, ele ctrical, and phy sic al sp ec ific atio ns f o r th e Co mpaq Des kpr o 4000N and 4000S Series Pe r sonal Computers. Table 2–4. En viro nmental Spe cif icatio ns T ...
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Compaq 4000N - page 32
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-14 Table 2–7. Diske tte Driv e S pe c ific ations Table 2-7 . Disket t e Drive S pec if ications Paramemt er Measurement Media Ty pe 3.5 in 1.44 MB/720 K B disk ette Height 1/3 By tes per Sector 512 Se cto rs p er Tr a ck: High D e ...
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Compaq 4000N - page 33
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers Fi rst Edition -Se ptem ber 2-15 Table 2–9. Hard D rive Spe cif icatio n s Table 2-9 . Hard Drive S pec if icat ions Parame ter 1.6 GB 2.1 GB Interface: EIDE EIDE Driv e Ty pe: 65 65 Driv e Siz e: 5.25 in 5.25 in Transfer Rate Heads : Interface: 94.0 Mb/s 16.7 MB/s 27 ...
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Compaq 4000N - page 34
Chapter 2 Sys tem Over view Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 2-16 This page is intentionally b lank. ...
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Compaq 4000N - page 35
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-1 Ch apt er 3 PROCESSOR/ MEMORY SUB SYSTE M 3. Chap t er 3 P ROCESSO R/M EM ORY SUB S YSTEM 3.1 INTRODUCTION Th i s cha pter describe s th e pr oce sso r /cache memory subsy stem o f the Co mpaq Deskpro 4000N an d 4000S Series o f P ...
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Compaq 4000N - page 36
Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-2 Mem. Data Bus Mem. Addr . 3.2 PENTIUM M MX- B ASED PROCESSO R/M EMO RY SU B S YS TEM Th e processo r / m emory sub sy stem i s based on th e Pent i um MMX m i cr opr ocesso r , a 512-KB or 1- MB sec o n da r y cache, a n d ...
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Compaq 4000N - page 37
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-3 3.2.1 PE NT IU M MMX MIC ROP ROC ESS OR Th e Pen t i um MMX m i cr opr ocessor is softwar e-comp atible w ith earlie r generatio n x86 micro pr oc e ss o rs b ut pro v ide s s ignif icantly higher perf o rman ce due to b o th high ...
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Compaq 4000N - page 38
Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-4 3.2.2 B US/ PRO CES S ING S PEED SELECT Th e Pen t i um MMX-based system bo ar d i n clu d es a four- p os itio n DIP sw itch (SW 1) that is u se d to se lect the H os t b us f r equ enc y an d th e pro c es sing f r eque ...
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Compaq 4000N - page 39
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-5 3.2.4 SYS TE M MEMO RY The sy ste m b o ard co ntain s tw o 168-pin DI MM s o ck ets f or sy ste m memo r y . This sy ste m is desig n ed for usi n g SDRAM DIMMs. As sh i pp ed fr om t h e fact or y th e sta n d a r d config u r a ...
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Compaq 4000N - page 40
Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-6 Table 3–5. SPD Ad dr ess Ma p ( SDRAM DIMM) Table 3-5 . SPD Addre ss Map (SDR AM DIMM) Byte Descr iption Not es Byte Descr iption N otes 0 N o. of Bytes Written In to EEPROM [1] 62 SPD Revision [7] 1 Total Bytes (#) In E ...
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Compaq 4000N - page 41
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-7 Figure 3-3 sh ow s th e sy stem memo r y map. NOTE: All loc ations in the 256 megaby tes of syste m m em o ry are cac heable in the L2 c ache. Figu re 3–3. System Memor y Map High BIOS Area ( 256 KB ) Ex tended Memory (48 MB) FF ...
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Compaq 4000N - page 42
Chapter 3 Processor/Memory Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 3-8 3.2.5 S UB SYSTEM CONFIGURATION The VT82C595 c o mponent prov i des the c onfiguration f unctio n fo r th e proc es so r/memo ry sub sy stem. Tab le 3-6 lis ts the c o nfiguration registe rs used fo r setting and checking ...
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Compaq 4000N - page 43
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-1 Ch apt er 4 SYSTE M SUPPORT 4. Chapter 4 SYSTE M SUPPOR T 4.1 INTRODUCTION This c hapter co ve r s sub je c ts de alin g w ith bas ic s y ste m architec ture and co ve r s the f o llo w in g topics : ♦ PCI b us ov ervie w (4.2) ...
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Compaq 4000N - page 44
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-2 4.2 PCI BUS OVERVIEW NOTE: This se c tio n desc r ibe s the P CI b us in ge neral an d h ighligh ts b us imple mentatio n in th is particular sy s tem. F o r detaile d info r mation regarding PC I b us o pe ration, ref e r to the PC I ...
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Compaq 4000N - page 45
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-3 4.2.1 PCI CONNECTOR NO TE: See c aution below. Figu re 4–2. 32-Bit PCI Bus Conn ecto r (32-Bit Ty pe) Table 4–1. 32-Bit PCI Bus Conn ecto r Pin out Table 4-1 . PCI B us Connec t or Pinout Pin B Signal A Signal Pin B Signal A S ...
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Compaq 4000N - page 46
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-4 4.2.2 PCI B US M ASTER ARB ITRATION The PCI b us suppo r ts a b us maste r/tar get arb itration sc heme. A bu s maste r is a de v ice that h as b ee n gr an ted c o ntrol o f the b us f or the purpo se o f initiatin g a transactio n . ...
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Compaq 4000N - page 47
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-5 4.2.3 PCI B US TRANSACTIONS The PCI b us c onsists o f a 32-b it path (AD31-00 lines) that use s a multiple xed s cheme fo r han dling bo th addres s and data transf e rs. A b us tran sac tio n co nsists o f an addres s c y cle an ...
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Compaq 4000N - page 48
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-6 Figure 4-3 sho w s how th e lo adin g of 0CF8h results in a Ty pe 0 c o nfiguration cy cle o n th e PC I b us . Th e D ev ice Nu mb er (b its <15..11 > de termines w h ich o n e o f the AD 31..11 lines is to be ass erte d high f ...
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Compaq 4000N - page 49
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-7 Not r equired Table 4–4. PCI F unctio n Co nfig uration A cces Table 4-4 . PCI F unct ion Configurat ion Access PCI Function D evic e No. Function No. Host/PCI Bri dge 0 0 PCI/ISA Bridge 7 0 IDE Interface 7 1 USB Interface 7 2 A ...
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Compaq 4000N - page 50
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-8 Table 4–5. PCI D ev ice Ide ntific ation Table 4-5 . PCI Dev ic e I dentif ication PCI Device Vender ID Devi ce ID VT82C 595 (North B ridge) 1106h 0595h VT82C 586 (South Br idge): PCI /ISA Br idge (Func tion 0) EID E Controller (Fun ...
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Compaq 4000N - page 51
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-9 4.2.5 PCI INTERRUPT MA PPING Th e PCI b us prov ides f or fo ur in terr upt sign als; INTA-, INTB-, INTC-, a n d INTD-. Th ese sig nals may be generate d b y o n-bo ard PCI d ev ice s o r by de vic e s installe d in the PC I s lo ...
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Compaq 4000N - page 52
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-10 4.2.6 PCI CONFIGURATION PC I b us o pe rations, e sp ec ially thos e that in vo lve IS A b us interactio n, r equ ire the c o nfig uration o f ce r tain par amete rs su ch as P CI I R Q ro uting, to p o f me mo ry a c ce ss ab le b y ...
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Compaq 4000N - page 53
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-11 4.3 ISA B US OVERVIEW NOTE: This se c tio n desc r ibe s the I SA b us in ge neral an d high ligh ts b us imple mentatio n in th is particular sy s tem. F o r detaile d info r mation regarding IS A b us o pe ration, ref e r to th ...
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Compaq 4000N - page 54
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-12 4.3.1 ISA CONNECTOR NO TE: See c aution below. Figu re 4–6. ISA Expan sion Conn ecto r Table 4–7. IS A Ex pans io n Co nne c to r P ino ut Table 4-7 . ISA E x pans ion Connec t or Pinout Pin Signal Pin Signal Pin Signal Pin Signa ...
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Compaq 4000N - page 55
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-13 4.3.2 IS A B US TRANS ACTIONS The ISA bu s suppo r t s 8- and 16-bit tran sfe r s at an 8-MH z r ate. Dev ices limited to 8-bit transfe rs use the lo w er b y te po rtion (data lin es 7..0) w hile 16-b it tran sfe rs use the f ul ...
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Compaq 4000N - page 56
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-14 The f ollo wing gu ide lines ap ply to o ptio n al IS A de vic e s installe d in the sy s tem: ♦ O n b us line s that ca n be driv en b y a co n tr olle r bo ard, th e driv er s hould b e ab le to sink a minimum of 20 ma at 0.5 V D ...
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Compaq 4000N - page 57
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-15 4.3.3 DIRECT M EMO RY ACCESS Dir ect Mem or y Access (DMA) is a m et h od by whi ch a n I SA d evice a ccesses system m em or y with out i n volvin g t h e m i cr opr ocessor. DMA i s n or mally us ed to tran sf er b lo c ks o f ...
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Compaq 4000N - page 58
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-16 4.3.3. 1 Page Register s Th e DMA pa ge r egi st er con tain s th e e igh t mos t signific ant bits o f the 24-bit addres s and w o rks in co n jun ction with th e DMA co n t r oller s t o def in e th e complete (24-bit)addr ess fo r ...
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Compaq 4000N - page 59
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-17 Th e RA M refresh is designed to pe r fo r m a m emory read cy cle o n each of th e 512 r ow addr esse s in th e DR AM me mory spac e. R ef resh o peratio ns are use d to ref resh memo r y o n th e 32-b it memory bus and t h e IS ...
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Compaq 4000N - page 60
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-18 4.3.4 INTERRUPTS The mic rop roc e ss o r use s tw o ty pe s o f interr upts; mas kab le and nonmask ab le. A mask ab le interrupt can b e enab led o r dis ab led w ithin th e mic ropro c es so r by the u se o f the S TI and CL I ins ...
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Compaq 4000N - page 61
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-19 Table 4–11. Mask able Interr upt Prio rities and Assign m ent s Table 4-1 1. Maskable Interrupt Priorities and Assignments Priority Signal Label Source (Typical) Notes 1 IRQ 0 Interv al timer 1, c ounter 0 2 IRQ 1 Key board 3 I ...
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Compaq 4000N - page 62
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-20 4.3.4. 2 Non-Mask able I nter rupts No n -maskb le interrupts c ann ot b e maske d (inh ibite d) w ith in th e micro pro ce sso r itse lf b ut may b e mask ab le b y so f tw are us ing lo gic ex ternal to the micro pr oc e ss o r. Th ...
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Compaq 4000N - page 63
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-21 SMI- Gener ation The S MI- (Sy s tem M anageme n t In terrupt) is ty pically us e d f o r po w er manage ment f unctio n s. Whe n po w er manage ment is e n able d, inactiv ity timers are mo n itored . When a time r times o ut, S ...
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Compaq 4000N - page 64
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-22 4.3.5 INTERVAL TIM ER The interval time r generates pulse s at so ftw ar e (programmab le) interv als. A 8254-c ompatib le timer is integrated into the S o uth B ridge chip. The time r func tio n pr ov ides thr ee co unters, the func ...
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Compaq 4000N - page 65
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-23 4.4 SYS TEM CLOCK DISTRIB UTION The sy ste m uses an ICS9147-08 or co mpatible par t fo r generation of most c loc k sign als. Table s 4-15 lists th e c lock s ign a l s an d to w h ich compo n ent s th ey ar e distri buted. Tabl ...
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Compaq 4000N - page 66
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-24 4.5 REAL-TIM E CLOCK AND CONFIGURATION M EM O RY The R eal-time clo ck (RTC) and co n figuration memo ry f unctio n s are prov ided b y the PC87307 I/O c o nt r olle r . Th e R TC uses the first 14 o f 256 b y tes o f c onf iguration ...
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Compaq 4000N - page 67
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-25 4.5.1 CONFIGURATION M EM ORY B YTE DEFINITIONS Tab le 4-16 lis ts the mapping o f the co n figuration memo r y . Table 4–16. Conf iguratio n Me mo ry (C MOS) Map Table 4-1 6. Configurat ion Memor y ( CM O S) Map Location Functi ...
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Compaq 4000N - page 68
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-26 RTC Control Re g i st e r A, B yte 0 Ah Bit Function 7 Updat e in Progres s. R ead only. 0 = Time update will not oc cur befor e 2444 us 1 = Time update will oc cur w ithin 2444 us 6..4 Div ider C hain Control. R /W. 00x = O sc illat ...
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Compaq 4000N - page 69
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-27 Co nfigu ration Byte 0Eh, Diagnostic Statu s Default V alue = 00h This b y te c o ntain s diagno stic status data. Configurati on By te 0Fh, Sy st e m Rese t Code Default V alue = 00h This b y te c ontains the sy s tem re se t co ...
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Compaq 4000N - page 70
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-28 Co nfigu ration Byte 13h, Sec urity Fu ncti ons Default V alue = 00h Bit Function 7 Res erv ed 6 Quic k Blank E nable After S tandby: 0 = Dis able 1 = Enable 5 Adminis trator Pass word: 0 = Not pres ent 1 = Pres ent 4 Res erv ed 3 Di ...
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Compaq 4000N - page 71
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-29 Co nfigu ration Bytes 19h-1Ch, Hard Drive Types B y te 19 h co n tains the hard drive ty pe f o r drive 1 o f the p rimar y co n tr olle r if b y te 12h b its <7 ..4> hold 1111b . B y te 1Ah co n tains th e har d dr iv e ty ...
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Compaq 4000N - page 72
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-30 Co nfigu ratio n Byte 26h , Au x iliary P eripheral C o nf igu ratio n Default V alue = 00h Bit Function 7,6 I/O Delay Selec t 00 = 420 ns ( default) 01 = 300 ns 10 = 2600 ns 11 = 540 ns 5 Alter native A 20 Switc hing 0 = Dis able po ...
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Compaq 4000N - page 73
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-31 Default V alue = 00h Bit Function 7..5 Reserved 4 Pr imary H ard Driv e Enable ( Non-PC I IDE Controllers ) 0 = Dis able 1 = Enable 3..0 Reserved Co nfigu ratio n Byte 2A h, Hard Driv e Tim eo u t Default V alue = 02h Bit Functio ...
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Compaq 4000N - page 74
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-32 Configurati on By te 2Dh, Addi t i onal Fl ag s Default V alue = 00h Bit Function 7..5 Reserved 4 Memory Tes t 0 = Tes t memory on pow er up only 1 = Tes t memory on w arm boot 3 POST Error H andling (BI OS D efined) 0 = Displa y “ ...
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Compaq 4000N - page 75
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-33 Co nfigu ration Byte 35h, APM Statu s Flags Default V alue = 11h Bit Function 7..6 Pow er Cons erv ation State: 00 = Ready 01 = Standby 10 = Sus pend 11 = Off 5,4 Res erv ed 3 32-bit C onnection: 0 = Dis connec ted, 1 = Connec te ...
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Compaq 4000N - page 76
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-34 Co nfigu ration Byte 45h, K e yboard S noo p Data Default V alue = xx h Bit Function 7 Cnt rl/F10 Key Status : 0 = Cntrl & F10 key s not pr ess ed 1 = Cntrl & F10 key s pr ess ed 6 F10 Key Status : 0 = F10 k ey not pres s ed ...
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Compaq 4000N - page 77
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-35 Co nfigu ration Byte 52h, B oard Rev ision T h i s byt e h ol d s t h e boa r d r e vi s i on as cop i e d fr om t h e boot bl ock se ct or . Co nfigu ration Byte 53h, 54h, SW SMI Co mm and/Data B ytes Co nfigu ration Byte 55h, A ...
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Compaq 4000N - page 78
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-36 Co nfigu ratio n Byte 83h , Microp ro cess o r Id entif icatio n This b y te ho lds the c o mpo nent ID and c hip rev isio n of th e mic ropro c es so r . Co nfigu ratio n Byte 84h , Microp ro cess o r Rev isio n Co nfigu ration Byte ...
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Compaq 4000N - page 79
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-37 Co nfigu ration Byte 90h, 91h, Total Su per Extended Memo r y Configu r ed This b y te ho lds the v alue of th e amo unt o f ex tende d s y ste m memo r y th at is c o nfig ured. Th e amount i s give n i n 64-KB in cr ement s. Co ...
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Compaq 4000N - page 80
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-38 Co nfigu ration Byte 94h, ROM Flash/Po wer B utto n Status Default V alue = 00h Bit Function 7..5 Reserved 4 ROM Flas h In Prog ress (if set) 3 Res erv ed 2 Pow er Button Inhibit ed (ifs et) 1 Us er-F orced B ootblock (if s et) 0 ROM ...
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Compaq 4000N - page 81
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-39 Configurati on By te 9Dh, E SS Audio Co nfi g urati on By te Default V alue = 12h Bit Function 7 Res erv ed for G ame Port Enable 6,5 Audio Addr ess 00 = 22xh 01 = 23xh 10 = 24xh 11 = 25xh 4,3 DMA Channel 00 = Dis abled 01 = DMA0 ...
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Compaq 4000N - page 82
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-40 Co nfigu ratio n Byte C7 h, C 8h, S erial P o rts 1 an d 2 ( Res pectiv ely) C o nfig u ratio n Bytes Default V alue = FEh, 7Dh Bit Function 7..2 Bas e I/O Addres s (in pac k ed format) (Algor ithm: [Addr. - 200h] / 8) (i.e., 3Fh = 3 ...
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Compaq 4000N - page 83
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-41 4.6 I/O M AP AND REGISTER ACCESSING Th i s secti on descr i bes th e sy stem I / O m a p a n d m et h ods of acce ssin g var i ous sy stem fun cti on s. 4.6.1 SYSTEM I/O MAP Table 4–17. System I/ O Ma p Table 4-1 7. System I/O ...
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Compaq 4000N - page 84
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-42 4.6.2 87307 I/O CONTRO LLER CONFIGURATION The 87307 I/O c o ntr o ller co n tain s v a r ious fu nctio ns suc h as the key b o ard/mous e interf ace s, dis ke tte inte rfac e, s e rial in terfac es, and paralle l interfac e. So ftw a ...
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Compaq 4000N - page 85
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-43 The 87307 I/O Co ntr o ller pr ov ides 11 general purpose pins th at can be individually co nfigured as eith er i n puts or outputs. Th ese pins ar e mapped as tw o gener al pur pos e po r ts an d sof t ware- acces s a bl e th r ...
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Compaq 4000N - page 86
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-44 4.7 SYS TEM M ANAGEM ENT SUPPORT This se ctio n desc ribe s the hardware s uppo rt of f unctio ns invo lving se curity , saf ety , identif icatio n , and po w er co n sumptio n of th e s y ste m. Sy ste m manageme nt fu nctio ns are ...
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Compaq 4000N - page 87
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-45 4.7.2 PAS S W ORD PRO TECTIO N Wh en en a bled, th e user is p r ompt ed t o ent er th e powe r - on p a ssword d u r i n g POST . If an inco r rec t entry is made , the sy s te m halts and do es not boot . T h e P ower -O n pa s ...
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Compaq 4000N - page 88
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-46 4.7.3 I/O SECURITY The 87307 I/O c o nt r olle r allow s variou s I/O f un ctio ns to b e disab l ed thr ough co n f igur ation registe r s. In addition, th e c o nfiguration r egiste rs of th e 87307 are f urth er pr ote cte d b y C ...
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Compaq 4000N - page 89
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-47 4.7.5 TEM PERATURE SENSING Tw o co mponents (o ne programmab le L M75 and o n e TC623) are use d in monito ri n g th e intern al temp erature o f the sy s tem. The LM 75 s e nso r is mo unted in the c avity o f the mic rop roc e ...
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Compaq 4000N - page 90
Chapter 4 System Support Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 4-48 4.7.6 POWER M ANAGEM ENT Th is sy stem i n cludes ha r dwar e support of Adv a n ced Pow er Ma n agemen t (APM ver. 1. 2) f irmw are and so ftw are and is Energy Star-c ompliant. 4.7.6. 1 HARD DRIVE SPINDOWN CONTROL The time o ut par ...
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Compaq 4000N - page 91
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-1 Ch apt er 5 INPU T/OU TPUT IN TERFA CES 5. Chap t er 5 INP UT/OUTPUT INTERFACES 5.1 INTRODUCTION This c hapter de sc ribe s the sy s tem ’s inte rfac es th at pro vi de input and ou tput ( I/O) po rtin g o f data and spe cif ic ...
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Compaq 4000N - page 92
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-2 5.2.1. 1 IDE Conf igur ation Registe rs Th e IDE in terface is h a n dled b y t h e 82586 c ompo n ent a n d co nfigur ed as a PCI dev ice with bus maste rin g capab ility . Th e PC I co n fig uration regis ters f or th ...
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Compaq 4000N - page 93
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-3 5.2.1. 3 IDE ATA Control Registers The IDE c o nt r olle r of the 82586 dec o des the address in g of th e standar d AT attachment (ATA) regis te rs f o r th e co nn ec ted driv e, w hich is w here the A TA c ontrol re giste r s a ...
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Compaq 4000N - page 94
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-4 The c o ntents o f the Error reg iste r ar e interprete d as a diagno stic s tatus b y te af ter th e e xe cu tio n of a diagno stic co mmand o r whe n th e sy s tem is initialized. Bit Function 7 Bad B lock Mark D etec ...
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Compaq 4000N - page 95
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-5 Driv e Select/Head Regis ter, I/O Po rt 1F6h/176h Bit Function 7 Res erv ed 6,5 Sector Size: 00 = Res erved 01 = 512 byt es/s ector 10, 11 = Res erved 4 Drive Select: 0 = Driv e 1 1 = Driv e 2 3..0 Head S elect N umber: 0000 = 0 1 ...
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Compaq 4000N - page 96
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-6 Co mm and Register, I/O Port 1F 7h/177h (Write O nly) The ID E c o ntr o ller c o mmands are w ritten to this re gis ter. The c o mmand w rite ac tio n shou ld b e pref ace d w ith th e lo ading o f data into the appro ...
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Compaq 4000N - page 97
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-7 Drive Co ntro l Register , I/O Port 3F 6h/376h (Write O nly) Bit Function 7..3 Reserved 2 Cont roller Contr ol: 0 = Re-enable 1 = Reset 1 Inter rupt Enable/D isable 0 = Dis able interrupts 1 = Enable interr upts 0 Res erv ed Drive ...
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Compaq 4000N - page 98
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-8 5.2.2 IDE CONNECTORS Th i s sy stem in cludes tw o standa r d 40-pin co nn ecto rs an d one 50-pin co n n ecto r fo r IDE devic es. De v ice s attac hed to the 40-pin co n n ecto r s o b tain pow er th r ough a se parat ...
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Compaq 4000N - page 99
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-9 Th e 50-pin co nn ecto r i s in tended fo r a CD-ROM dr ive that operates as a slave on th e se co nda r y IDE in t er face . Th is in terface includes po we r a n d audio signa ls. Th e 50-pin co n n ecto r i s illustrate d b e l ...
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Compaq 4000N - page 100
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-10 5.3 DISK ETTE DRIVE INTERFACE Th e diskette drive inter face s upports up to tw o diskette drives thr ough a stan dar d 34-pin diskette drive co n n ecto r . All De skpro 4000S mo dels include a 3.5 inch 1.44-MB dis ke ...
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Compaq 4000N - page 101
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-11 5.3.1 DIS K ETTE DRIVE PRO GRAM M ING 5.3.1. 1 Diskette Drive Int erface Configuration The dis ke tte drive co ntr olle r must b e c o nfig ured fo r a spe cif ic add ress and also must b e e nable d b ef ore it can b e us ed . A ...
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Compaq 4000N - page 102
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-12 5.3.1. 2 Diskette Drive Int erface Control The B IO S f un ctio n INT 13 prov ides b asic c ontrol o f the disk ette driv e inte rfac e. The d iske tte dri ve inter face can be c ontr olled by so f tware th r ough I/O- ...
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Compaq 4000N - page 103
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-13 Main Statu s Register, I/O Port 3F 4h/374h (Read Only) Bit Function 7 Reques t for Mas ter. W hen set, indic ates the cont roller is ready to s end or rec eive data fr om the CPU . Cleared immediat ely after a by te trans fer. I ...
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Compaq 4000N - page 104
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-14 5.3.2 DIS K ETTE DRIVE CO NNECTOR Th i s sy stem uses a standa r d 34-pin conn ecto r (r ef er to Figure 5-2 an d T a ble 5-8 f o r t h e pinout) f o r diske tte driv es . Driv e po w er is su pplie d throu gh a se par ...
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Compaq 4000N - page 105
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-15 5.4 SERIAL INTERFACES The se r ial in terf ac es tran smit and r ecei ve asyn ch r on ous ser ial data w ith exte rn al dev ice s. The se rial in terf ace f unctio n is pr ov i ded b y th e 87307 I/O c o nt r olle r co mponent, w ...
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Compaq 4000N - page 106
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-16 5.4.2 S ERIAL INTERFACE PROGRAMM ING 5.4.2. 1 Ser ial Inter face Configur ation The s erial interf ace s must b e c o nfig ured f or a sp ec ific address ran ge ( COM 1, CO M2 , etc .) an d also must b e ac tiv ated b ...
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Compaq 4000N - page 107
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-17 5.4.2. 2 S e ri a l I n t e rfa c e C o n t ro l The B IO S f un ctio n INT 14 prov ides b asic c ontrol o f the se rial in terfac e. The se r ial interfac e can be co n tr olled b y so ftw ar e th r ough th e registers listed in ...
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Compaq 4000N - page 108
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-18 Baud R ate Diviso r Latch Register , I/O Port 3F 8h, 3F9h/2F8, 2F9h When b it <7> o f the Line Co n tr o l r egiste r is se t (1), a write to this pair o f loc ations lo ads the dec imal v alue us ed to divide th ...
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Compaq 4000N - page 109
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-19 F IF O Co ntro l Regis ter, I/O P ort 3 FA h/2 FA h ( Write On ly) Th i s wri te-on l y r egi st er en ables a n d cl ea r s t h e FIFOs a n d set t h e tr i g g er level an d DMA m ode. Bit Function 7,6 Rec eiver Trigger Lev el ...
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Compaq 4000N - page 110
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-20 Line Statu s Register, I/O Port 3F Dh/2FD h (Read Only) This regis te r co ntain s the s tatus o f the cu rr ent data tran sf er. B its <2 ..0> are c le ared w hen r ead. Bit Function 7 Parity Error, Fram ing Err ...
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Compaq 4000N - page 111
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-21 5.5 PARALLEL INTERFACE The parallel inte rfac e p rov ides co n n ectio n to a p eripheral de v ice that h as a c omp atib le inte rfac e, the mo st c o mmo n be ing a pr in ter. The parallel interfac e f unctio n is integrated i ...
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Compaq 4000N - page 112
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-22 5.5.2 ENH ANCED PARALLEL PORT M O DE In En ha n ced P ar allel Po r t (EPP) mo de, in crease d data tran sf ers are po ss ible (up to 2 MB /s) due to a har dw are pro to c o l that pr ov ides auto matic addre ss and st ...
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Compaq 4000N - page 113
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-23 5.5.4 PARALLEL INTERFACE PRO G RAM M ING 5.5.4. 1 Pa ra lle l I n t erfa ce Co n f i gu ra t i o n The paralle l interfac e mus t b e c onf igured f o r a spe cif ic add res s range (L PT1, L PT2, e tc.) and also must b e e nable ...
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Compaq 4000N - page 114
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-24 5.5.4. 2 Pa ra l l e l I n t e rf a c e C o n t ro l The B IO S f un ctio n INT 17 prov ides simplif ied c ontrol o f the paralle l interfac e. B asic f unctio n s su ch as initializatio n, characte r pr in tin g, an d ...
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Compaq 4000N - page 115
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-25 Statu s Register, I/O Port 379h, Read Only This regis te r co ntain s the c urrent prin ter status . R ead ing this regis ter c lears the interrupt co n ditio n of the paralle l po rt. Bit Function 7 Printer Bu sy (if 0) 6 Pr int ...
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Compaq 4000N - page 116
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-26 F IF O Reg ister, I /O P o rt 7F 8h (EC P Mo de On ly) While in ECP/f orw ard mode , th is lo catio n is use d f or f illing th e 16-b y te FIF O w ith data by tes . R e ads hav e no e ff ec t (e xc e pt w h en use d i ...
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Compaq 4000N - page 117
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-27 5.5.5 PARALLEL INTERFACE CO NNECTO R Figure 5-4 and Table 5-15 show th e co n n ec tor and pin o ut of th e parallel inrt ef ace co n n ec tor. Figu re 5–5. Par allel Interfac e Co n necto r (Fe male D B -25 as v iew ed f r o m ...
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Compaq 4000N - page 118
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-28 5.6 K EYBOARD/POINTING DEVICE INTERFACE The ke y b o ard/po intin g de v ice in terf ace p rov ides the c o nn ec tio n of an enh an ce d ke y b o ard and a mo use using PS /2-ty pe co n n ec tio ns. The ke y bo ar d/p ...
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Compaq 4000N - page 119
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-29 Co n tr o l of th e data an d clo ck s ign als is shared b y th e 8042and the key b o ar d depe n din g on th e o riginator o f the tran sf e rr ed data. No te that the c lo ck sig nal is alw ay s ge n erated b y th e ke y bo ard ...
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Compaq 4000N - page 120
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-30 5.6.2 POINTING DEVICE INTERFACE OPERATION The po intin g dev ice (ty pically a mo use ) c o n n ects to a 6-pin DIN-ty pe co n n ec to r th at is ide ntical to the ke y b o ard co n n ec to r bo th ph y sically and e l ...
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Compaq 4000N - page 121
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-31 5.6.3. 2 8042 Control The B IOS f unctio n INT 16 is ty pic ally us ed f o r co ntr olling interac tio n with the ke y b o ard. Su b - f unctio n s o f INT 1 6 c o nduct the b asic r o utines o f han dlin g ke y bo ar d data (i.e ...
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Compaq 4000N - page 122
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-32 Tab le 5-18 lis ts the co mman ds th at can be s ent to the 8042 b y the CPU . Th e 8042 us es IR Q1 f or gaining th e atte ntion of th e CP U . Tab le 5–18. CPU Commands To The 8042 Table 5-1 8. CPU Commands T o The ...
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Compaq 4000N - page 123
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-33 Table 5-1 8. CPU Commands T o T he 8042 (Continued) Value Command D escripti on C0h R ead input port of the 8042. This c ommand direc ts the 8042 t o transf er the cont ents of t he input port to the output buff er so t hat they ...
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Compaq 4000N - page 124
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-34 5.6.4 K EYB OARD/POINTING DEVICE INTERFACE CONNECTOR Th er e a r e sep a r at e con n ect or s for t h e k eybo a r d a n d p oin t i n g d evi ce. Both con n ect or s a r e i d en t i ca l b oth phy sic ally an d ele ...
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Compaq 4000N - page 125
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-35 5.7 ETHERNET INTERFACE Th e sy stem bo a r d in tegra tes an E t h ern et in ter face th a t supports bo t h 10 an d 100 Mb ps Eth ern et co mmun i catio ns using IEEE 802.3 (ISO 8802-3) proto co l. Two co nn ectio n o ptio n s a ...
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Compaq 4000N - page 126
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-36 5.7.1 NIC CONFIGURATION/CONTROL The N IC is a PCI de v ice an d co n f igured thr oug h PCI c onf iguratio n spac e re gist ers. The N IC is co nt r olled thr ough I/ O r egister s mapped in th e 300h -30Fh r an ge. 5. ...
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Compaq 4000N - page 127
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 5-37 5.8 UNIVERSAL SERIAL B US INTERFACE The U n ive rsal Se rial Bu s (U SB ) in terfac e prov ides up to 12 Mb /s data transf ers b etw ee n th e ho st sy stem and p eripherals d es igned w ith a co mpatib le U SB in terf ac e. This ...
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Compaq 4000N - page 128
Chapter 5 Input/Output Int erfac e s Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on – Sept ember 1997 5-38 5.8.2 US B CONTROL Th e U SB is co n tr olled thr ough I/O r egisters as li sted in t a ble 5-21. Table 5–21. U SB Contr ol Re gisters Table 5-2 1. USB Cont r ol Regis t ers I/O Addr . Register 00, 01h Command 02, 03 ...
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Compaq 4000N - page 129
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 6-1 Ch apt er 6 GRAPHICS SUBSYST EM 6. Chap t er 6 GRAP HICS SUB S YSTEM 6.1 INTRODUCTION This c hapter de sc ribe s the graphics su b sy ste m. Th e graphics sub sy ste m is integrated o nto the sy stem b oard and o perates as a P CI ...
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Compaq 4000N - page 130
Chapter 6 Graphics Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 6-2 Gr aphics Mem ory Bus RGB Data Monit or (63..00) 6.2 SUB SYS TEM DESCRIPTION The graphics su b sy stem c onsis ts o f the S 3 Trio 64V 2/G X graphics c o ntr olle r an d tw o me gab y tes o f SG R AM f o r th e f rame b uff er mem ...
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Compaq 4000N - page 131
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 6-3 6.2.2 S 3 TRIO64V2/GX GRAPHICS CONFIGURATI ONS Th e Tr io64V2/GX -base d gra ph ics sub sy stem dir ectly supports stan dar d CGA, EGA, an d VGA mode s. U sin g t h e supplied drivers, th e c ontr oller with t h is sy stem support ...
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Compaq 4000N - page 132
Chapter 6 Graphics Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 6-4 6.2.3 S 3 TRIO64V2/GX GRAPHICS SUB S YSTEM PROGRAMM ING The S 3 Trio6 4V2 /GX is c o mpatib le w ith so f tw are w r itten f o r VGA, E GA, a n d C GA m odes. Dr i ver s a r e su p p li ed for con t r ol of gr a ph ics ( G UI) a c ...
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Compaq 4000N - page 133
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 6-5 Table 6–5. S3-Spe cif ic Co n t r ol R egiste r Mappi n g Table 6-5 . S3-Spec if ic Cont r ol Regis t er Mapping I/O Address Function I/O Address Function 3x5. 2D..3Ch [ 1] Ex tended VGA Regist ers 42E8h, 4AE8h Enhanced Command ...
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Compaq 4000N - page 134
Chapter 6 Graphics Subsystem Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 6-6 6.2.5 CONNECTORS Th e gr ap h i cs subsy stem p r ovides a VGA m on i tor con n ector d escr i bed in t h e followin g fig u r e an d tab le. Figu re 6–2. VGA Mon it or Conn ector , ( Fe male D B-15, as v iew ed f r o m th e rea ...
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Compaq 4000N - page 135
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 7-1 AC I nput To Syst em Board & Drives Ch apt er 7 POWER and SIGNAL DISTRIB UTION 7. Chap t er 7 P OWER SUPPLY AND DISTRIBUTION 7.1 INTRODUCTION Th i s cha pter describe s th e pow er supply an d meth od o f ge ner a l pow er an ...
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Compaq 4000N - page 136
Chapter 7 Pow er and Signal Distributi on Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 7-2 7.2.1 PO WER S UPPLY A S S EM B LY The 76-w att pow er supply asse mb ly is co n tain ed in a single unit th at fe atures a s ele c table in put v oltage o f 90-132 V AC and 180-264 VAC. The po w er supply asse mb ly ...
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Compaq 4000N - page 137
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 7-3 7.2.2 POWER CONTROL The po w er supply asse mb ly is co n tr olle d digitally by the PS O n sign al (Figur e 7-1). When PS O n is asser ted (h igh ), th e Pow er Suppl y Asse mbly is a cti vated. Wh en PS On i s de-asser t ed, t h ...
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Compaq 4000N - page 138
Chapter 7 Pow er and Signal Distributi on Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 7-4 7.3 POWER DISTRIBUTION 7.3.1 3. 5/5/12 VDC DISTRIBUTION The po w er supply ass emb ly includes a co n necto r (P1) that mates direc tly w ith th e sy ste m bo ar d co n n ec to r (P17) w hen th e asse mbly is installe ...
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Compaq 4000N - page 139
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 7-5 7.3.2 LO W VO LTAGE DIS TRIB UTION Th e sy stem bo a r d in cludes a pr ov i sion fo r pr oduc in g 2. 5 VDC fo r micr oproce sso r s th a t r equire suc h a lev el f or co r e po we r. Th e lo w v oltage circuitry (Figure 7-3) co ...
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Compaq 4000N - page 140
Chapter 7 Pow er and Signal Distributi on Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 7-6 7.4 SIGNAL DISTRIBUTION Figure 7-4 sho w s ge neral signal distr ibutio n be tw e en th e main sub asse mblie s o f the sy ste m un it. NOTES: [1] D esk pro 4000S only [2] No c able us ed for interfac e; direc t c onn ...
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Compaq 4000N - page 141
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-1 Ch apt er 8 BIOS RO M 8. Chapter 8 BIOS ROM 8.1 INTRODUCTION The B asic I nput/Out put S y ste m (B IO S) o f the co mpute r is a c o llec tio n of machine language pro grams sto red as fi rmware in r ead-o n ly memo ry (RO M) . T ...
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Compaq 4000N - page 142
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-2 8.2 B OOT FUNCTIONS Th e sy stem suppo r t s n ew sy stem boot fu n ct i on s t o s upport r emote R OM flashin g an d PC97 requireme nt s. This sy ste m also suppo r ts the EL To rito sp ec if icatio n fo r b o o tab le C Ds . NOTE: This s ...
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Compaq 4000N - page 143
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-3 8.3 ACCESS ING CONFIGURATION MEM ORY Co nfig uration me mo ry (C MOS an d NVRAM) sh oul d be accessed u si n g t h e a p p r opr iate B IOS f unctio n . Th e f o llo w ing su b se ctio ns de sc ribe sev eral B IOS f unctio n s av ...
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Compaq 4000N - page 144
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-4 8.3.2. 1 INT 15, AX=E 841h, B L=00h - Set CM OS Defaults This f unctio n sets a bit in NV R AM that in structs the B IO S to load NV R AM w ith def ault v alue s du r i n g t h e n ex t s yst em boot . T h e u s e r w ill no t be pro mpte d ...
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Compaq 4000N - page 145
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-5 8.4 CLIENT M ANAGEM ENT SUPPORT Clie nt Manageme n t deals w ith issu es o f se curity , identif ic atio n, an d s y ste m manageme nt functions. A group o f B IOS IN T 15 functions ar e prov ided to suppo r t Cli en t Man agement ...
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Compaq 4000N - page 146
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-6 To suppo rt Window s NT an additional tab le to th e B IOS32 tab le ha s b ee n def in ed to co n tain 32- b it po in ters f or the D DC and SIT lo catio ns. The W in do w s NT e xtensio n table is as f o llo w s: ; Ex tension t o BIOS SERV ...
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Compaq 4000N - page 147
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-7 8.4.1 SYSTEM ID Th e INT 15, AX=E800h BIO S f un ction can be use d by so ftw a r e to ident i fy th e sy stem. Th e sy stem I D w ill be r eturned in the B X regis ter as f ollo w s: Series System ID Des kpr o 4000N 03D8h Des kpr ...
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Compaq 4000N - page 148
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-8 Timeout Counter Record ( Video Screensave), SIT R ecord 03h Byte [1] Function Default Value 0Ah Rec ord ID f or Video Sc reens ave Timeout 03h 0Bh No. of D ata By tes in R ecor d 09h 0Ch Firs t Value 0 0Dh 5 0Eh 10 0Fh 15 10h 20 11h 30 12h ...
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Compaq 4000N - page 149
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-9 Peripheral and Input Device Rec ord, SIT Record 07 h Byte Function Default Value 00h Rec ord ID 07h 01h N o. of Data Bytes in Record 34h 02h DMA Functions , SC SI Support , Flashable R OM, S etup Partit ion, 101 Keyboar d 07h 03h ...
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Compaq 4000N - page 150
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-10 Memory Module Information Record, SIT Record 08h Byte Function Default Value 00h Rec ord ID 08h 01h N o. of Data Bytes in Record 0Dh 02h No. of Sock ets 03h 03h Memory Soc ket Loc ation 0 00h 04h Memory Ins talled In Location 0 [1] 05h Mem ...
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Compaq 4000N - page 151
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-11 Extended Disk Support Record, SIT Reco rd 0Eh Byte Function Default Value 00h Rec ord ID 0Eh 01h N o. of Data Bytes in Record 02h 02h Pointer To Ex tended Dis k table ( High By te) [1] 03h Pointer To Ex tended Dis k table ( Low B ...
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Compaq 4000N - page 152
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-12 8.4.3 TEM PERATURE SENSOR A te mperature s enso r co mpone nt is mo unted in the c avity o f the mic rop roc e ss o r so ck et. This se nso r co mpone nt dete cts w h en the mic ropro ces so r h as reac hed a pro grammed te mperature le v ...
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Compaq 4000N - page 153
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-13 8.4.5 DIM M S UPPORT Th e BIO S in cludes DIM M suppo rt consistin g of the f ollo w in g: ♦ A cc ess co n tr ol w ith th e se r ial (I 2 C) EE PROM of th e DIMM ♦ R untime inf o rmation on ECC-c orrec tab le s ingle b it err ...
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Compaq 4000N - page 154
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-14 ENTR Y: AX = E827h BH = 02h RE TURN: CF = 0 (Succe ss) AH = 0 BX = 0000h (if no single bit ECC co r r ec ted err or h as oc curr ed) bit < 0 > , Er r or occur r ed on DI MM/ SI MM p a i r 0 bit < 1 > , Er r or occur r ed on DI ...
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Compaq 4000N - page 155
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-15 8.4.6 S ECURITY FUNCTIONS Th e INT 15 AX=E829h BIOS f un ction is used to co nt r ol v ar ious se curit y fe atur es o f th e sy stem. This f unctio n may be iss ue d remo tely (o ve r a n etw ork) b y a dr ive r . A re que st b ...
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Compaq 4000N - page 156
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-16 8.4.7 ACCES S ING CM OS FEATURE BITS The B IOS f unctio n INT 15, AX=E845h is a tri-mo dal call f or a c ce ssing areas in n on-v olatile memo ry us ed to sto r e v ariable s f or v ariou s f eatures . INPUT: EAX = E 845h BL = 0 , Rea d = ...
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Compaq 4000N - page 157
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-17 8.5 PNP S UPPO R T Th e BIO S in cludes Plug ’n Play (PnP) support fo r Pn P v ersion 1. 0A. NOTE : Fo r full P nP f unctio n ality to b e realize d, all pe ripherals us e d in th e s y ste m must b e d es igne d as “ PnP rea ...
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Compaq 4000N - page 158
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-18 8.6 POWER M ANAGEM ENT SUPPORT Th e Co mpa q Deskpr o 2000 sy st em i n cludes Advanced Pow er Man agemen t (APM) BIOS support that prov ides , if so co nfig ured, f or the auto matic s hutdo w n of certain areas w ithin a sy ste m af ter ...
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Compaq 4000N - page 159
Techn ical Referen ce Guid e Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-19 Standby - Th e c o mpute r is in a lo w po we r state : v ide o is o ff , so me sub sy ste ms may be dr awing les s p o w er, and the mic ropro ce sso r is halted ex ce pt fo r serv icing interrupts. V ide o graphics co nt r olle ...
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Compaq 4000N - page 160
Chapter 8 BIOS ROM Compaq Deskpro 4000N and 4000S P ersonal Computers F ir s t Edi ti on - September 1997 8-20 This page is intentionally b lank. ...
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Compaq 4000N - page 161
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - Sept embe 1997 A-1 Appendi x A ERROR ME SSAGES AND CODE S A. App end ix A ERROR MESS AGES AND CODES A.1 INTRODUCTION This appe n dix lists the e rr or co des and a b rief de sc r iption o f the pro b ab le cau se o f the e rr or. No te that n ot all e rrors lis ted in th is appe ndix ...
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Compaq 4000N - page 162
Appendix A Error Messages and Codes Compaq Pers onal Computers Changed - Sept ember 1997 A-2 A.4 PO WER- ON S ELF TES T ( POST) M ES S A G ES Table A–3. Pow er - On Self Test (POST ) Messag es Table A-3 . Power-O n Self T est ( P O ST ) M es s ages Err or Message P robabl e Cause Ba d P nP Se r ia l ID C he cksum Ser i al I D ch ecksu m o f Pn P ...
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Compaq 4000N - page 163
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - Sept embe 1997 A-3 A.5 PROCESSOR ERROR MESSAGES (1x x -xx ) Table A–4. Pr ocesso r E r r or Messag es Table A-4 . Processor Error Messages Message P robabl e Cause Message Prob able Cause 101-01 C PU t est failed 105-08 Port 61 bit <1> not at one 101-02 32- bit CPU test faile ...
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Compaq 4000N - page 164
Appendix A Error Messages and Codes Compaq Pers onal Computers Changed - Sept ember 1997 A-4 A.6 M EMORY ERROR M ESSAGES ( 2xx-x x) Table A–5. Me mo ry Erro r M e s s ag es Table A-5 . Memory Error Messages Message Prob able Cause 200-04 R eal memory siz e changed 200-05 E xtended memor y s ize c hanged 200-06 I nvalid memory c onfiguration 200-0 ...
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Compaq 4000N - page 165
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - Sept embe 1997 A-5 A.8 P R IN T ER ER RO R M ES S A G E S ( 4 xx- xx) Table A–7. Pri nte r Erro r Me s s ag e s Table A-7 . Printer Error Messages Message Probabl e Cause Message Probabl e Cause 401-01 Print er failed or not c onnected 402-10 Interr upt test and contr ol reg. faile ...
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Compaq 4000N - page 166
Appendix A Error Messages and Codes Compaq Pers onal Computers Changed - Sept ember 1997 A-6 A.10 DIS K ETTE DRIVE ERROR M ESSA GES ( 6 xx-xx ) Table A–9. Di sket t e Dr i ve Er r or Messa ges Table A-9 . Diskette Drive Error Messages Message Probabl e Cause Message Probabl e Cause 6xx -01 Ex ceeded max imum soft er ror limit 6x x- 20 Failed to g ...
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Compaq 4000N - page 167
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - Sept embe 1997 A-7 A.12 M O DEM COMM UNICATIONS ERROR MES SAGES ( 12xx -xx ) Table A–11. Se rial In terfac e Err or Me ss age s Table A-1 1. Serial Interf ace Error Messages Message Probabl e Cause Message Probabl e Cause 1201-XX Modem internal loopbac k tes t 1204- 03 D ata block ...
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Compaq 4000N - page 168
Appendix A Error Messages and Codes Compaq Pers onal Computers Changed - Sept ember 1997 A-8 A.13 HARD DRIVE ERROR M ESSAGES ( 17xx -xx) Table A–12. H ard D riv e Erro r Me s s ag e s Table A-1 2. Hard Drive Error Messages Message Probabl e Cause Message Probable C ause 17xx -01 E xc eeded max. soft er ror limit 17xx -51 Failed I/ O read tes t 17 ...
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Compaq 4000N - page 169
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - Sept embe 1997 A-9 A.14 HARD DRIVE ERROR M ESSAGES ( 19xx -xx) Table A–13. H ard D riv e Erro r Me s s ag e s Table A-1 3. Hard Drive Error Messages Message P robable C ause Message Pr obable C ause 19xx -01 D riv e not installed 19x x-21 Got s erv o pulses sec ond time but not fi ...
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Compaq 4000N - page 170
Appendix A Error Messages and Codes Compaq Pers onal Computers Changed - Sept ember 1997 A-10 A.16 AUDIO ERROR MESSAGES (3206-xx ) Table A–15. Aud i o Er r or Messag es Table A-1 5. Audio Error Message Message Prob able Cause 3206-x x A udio sub syste m in tern al e rror A.17 NETWORK INTERFACE ERROR MESS AGES ( 60xx-xx ) Table A–16. Ne tw o rk ...
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Compaq 4000N - page 171
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - Sept embe 1997 A-11 A.18 S C S I I N TE RF A C E E R R O R M E S S A G E S ( 6 5 xx- xx, 6 6 xx- xx, 6 7 xx- xx) Table A–17. SCSI In t er face Er r or Messa g es Table A-1 7. SCSI Int erf ace Error Messages Message P robable C ause Messag e Pr obable C ause 6nyy -02 D riv e not ins ...
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Compaq 4000N - page 172
Appendix A Error Messages and Codes Compaq Pers onal Computers Changed - Sept ember 1997 A-12 A.20 CEM M PRIVILEDGED OPS ERROR MES SAGES Table A–19. CE MM Pr i vil eged Ops E r r or Messa g es Table A-1 9. CEMM Privileged Ops Error Messages Message P robable C ause Messag e Pr obable C ause 00 LG DT ins truc tion 04 LL3 ins truc tion 01 LIDT in s ...
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Compaq 4000N - page 173
Techn ical Referen ce Guid e Compaq Pers onal Computers Ori ginal - July 1996 B-1 Appendi x B ASCII CHARACTE R SE T B. Appendi x B ASCII CHARACTER SET B.1 INTRODUCTI ON This appendix lists , in Table B-1, the 256-c har acte r ASCII c ode set including th e de cimal and hexadec imal value s. All A SCII s y mbo ls may be calle d w h ile in DOS or u s ...
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Compaq 4000N - page 174
Appendix B ASCII Character Set Compaq Pers onal Computers Ori ginal - July 1996 B-2 Table B-1 . ASCI I Code Set (Continued) Dec Hex Symbol Dec Hex Symbol Dec Hex Symbol Dec Hex Symbol 128 80 Ç 160 A 0 á 192 C0 • 224 E0 • 129 81 ü 161 A 1 í 193 C1 • 225 E1 ß 130 82 é 162 A 2 ó 194 C2 • 226 E2 • 131 83 â 163 A 3 ú 195 C3 • 227 E3 ...
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Compaq 4000N - page 175
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-1 Appendi x C KEYB OARD C. App end ix C K EYB OARD C.1 INTRODUCTION This appe n dix de sc ribe s the Co mpaq ke y bo ard th at is includ ed as s tandard w ith th e s y ste m un it. The ke y b o ard co mplies w ith th e indus tr y -standard c lass if icatio n of an ? ...
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Compaq 4000N - page 176
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-2 Key board Interface (Syst e m Uni t) Data / CLK C.2 K EYSTRO K E PROCES S ING A f un ctional bloc k diagr am of th e key str oke proc ess in g eleme n t s is show n i n Figur e C-1. Pow er (+5 V DC ) is o btaine d f rom the sy stem thro ugh the PS /2-ty pe inte rfac e . Th ...
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Compaq 4000N - page 177
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-3 C.2. 1 TRANSMIS S IONS TO THE S YS TEM The ke y b o ard proc ess o r se nds tw o main ty pe s o f data to th e s y ste m; co mman ds (o r r esp o nses to sy stem c ommands ) and ke y strok e s c an co de s. B ef ore the ke y bo ar d se nds data to th e s y ste m (s ...
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Compaq 4000N - page 178
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-4 C.2. 2 KEYB OARD LAYOUTS C.2. 2.1 Standar d Enhanced Keyboar ds Figu re C–3. U.S . En glish (101-Key ) Ke y bo ard Key Po sitions Figu re C–4. Natio nal (102-Key ) Ke y bo a r d Key Pos itio n s 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 ...
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Compaq 4000N - page 179
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-5 C.2. 2.2 Windows Enhanc ed Keyboards Figu re C–5. U.S . En glish Window s (101W-Ke y ) Ke y bo ard Key Po sitio n s Figu re C–6. Natio n al Window s (102W-K ey ) Ke y bo ard Key Po sitions 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 ...
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Compaq 4000N - page 180
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-6 C.2. 2.3 Windows Enhanc ed Keyboards w/Er ase-Ease Figu re C–7. U.S . En glish Win dow s (101W E-Key ) Key bo ard Key Pos itio n s Figu re C–8. Natio nal Win dow s (102W E-Key ) Key bo ard Key Pos itio n s 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 ...
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Compaq 4000N - page 181
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-7 C.2. 3 KE YS All key s genera te a m ake co de (w h en pr ess ed) and a break co de (w h en r elease d) w ith th e excep t i on of th e Pause key (pos . 16), which pr oduc es a make c ode only . All key s, a ga in , with th e except i on of th e Pause ke y , are al ...
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Compaq 4000N - page 182
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-8 C.2. 3.2 Multi-K eystr oke F unctions Shift - The Shift key (po s. 75/86), when h eld dow n , pr oduc es a shift s tate (uppe r case) f or key s in positio n s 17-29, 30, 39-51, 60-70, an d 76-85 as lo ng as th e Cap s Lo ck key (po s. 59) is toggled o ff . If th e Caps L ...
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Compaq 4000N - page 183
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-9 Ba ckspa ce Spac ebar Spac ebar Spac ebar Ba ckspa ce Spac ebar C.2. 3.3 Windows Keystrok es Windo w s-e nh an ced ke y bo ar ds in clude three additio n al key po sitio ns. Key po sitio ns 110 and 111 (marke d w ith th e W in dow s lo go ) have th e s ame f unctio ...
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Compaq 4000N - page 184
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-10 C.2. 4 KEYB OARD COM M ANDS Tab le C-1 lis ts the c ommands that the key bo ard can send to the sy ste m (spe cif ically , to the 8042- ty pe lo gic). Table C–1. Ke y bo ard-to -Sy stem Co mmands Table C-1 . Keyboard-to-System Commands Command Value Descri ption Key Det ...
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Compaq 4000N - page 185
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-11 Table C–2. Key bo a r d Scan Codes Table C-2 . Keyboard S c an Codes Key Pos. Legend Mode 1 Mode 2 Mode 3 1 Esc 01/81 76/F0 76 08/na 2 F1 3B/BB 05/F0 05 07/na 3 F2 3C/BC 06/F0 0 6 0F/na 4 F3 3D/BD 04/F0 04 17/na 5 F4 3E/BE 0C/F0 0C 1F/na 6 F5 3F/ BF 03/F0 03 27/ ...
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Compaq 4000N - page 186
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-12 Table C-2 . Key boar d S c an Codes (Continued) Key Pos Legend Mode 1 Mode 2 Mode 3 41 W 11/91 1D/F0 1D 1D /F0 1D 42 E 12/92 24/F 0 24 24/ F0 24 43 R 13/93 2D/F 0 2D 2D/F0 2D 44 T 14/ 94 2C/F0 2C 2C/F0 2C 45 Y 15/95 35/F 0 35 35/ F0 35 46 U 16/96 3C/F 0 3C 3C/F0 3C 47 I 1 ...
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Compaq 4000N - page 187
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-13 Table C-2 . Key boar d S c an Codes (Continued) Key Pos. Legend Mode 1 Mode 2 Mode 3 81 N 31/B1 31/F0 31 31/ F0 31 82 M 32/B2 3A /F0 3A 3A/F0 3A 83 , 33/B3 41/F0 41 41/F 0 41 84 . 34/B4 49/F0 49 49/F 0 49 85 / 35/B5 4A/F 0 4A 4A/F0 4A 86 Shift (right) 36/ B6 59/F0 ...
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Compaq 4000N - page 188
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-14 COM Port (Syst e m Uni t) Analog Video Data Motor Cntrl. Serial Data Cl o cks & LED Cntrl . Digital V ideo Data 24 VDC Key board Unit C.3 S CANNER DESCRIPTION The s canner ke y bo ar d, av ailab le as an op tio n, in teg rates a s cann er w ith a Spac eS ave r Windo w ...
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Compaq 4000N - page 189
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-15 C.3. 1 SCANNER OPERATION The sc an n er requ ires minimum us er interf ace fo r n ormal o pe ration. Insertio n o f a shee t o f har dco py activ ates the sc ann er. Ope rating paramete rs suc h as reso lutio n, brightness , and mo to r sp ee d ar e pro grammab le ...
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Compaq 4000N - page 190
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-16 Start Yes Sc an Image (Image Aquis ition) PRNU Correcti on MTF Correcti on Resol uti on Conv ers ion Thres hold (Intel.) Algorithm Yes No No Error Diffusion Pattern Dithe r Gamma Conv ers ion Halftone Output Des ired? Gra yscal e Compens ation Type of Halftone Pattern Dit ...
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Compaq 4000N - page 191
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-17 C.3. 1.1 Res olution/Shade Depth Th e dr i ve motor mechan i sm of th e CIS suppo r ts a vertical r eso lution of 400 dpi. Th e CIS prov ides a maximum horizontal reso lution of 200 dpi. Th es e f a cto rs pr ov i de true sp atial reso lutio ns of 100 an d 200 dpi ...
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Compaq 4000N - page 192
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-18 C.3. 2 SCANNER INTERFACE The s canner co mmunicate s w ith th e s y ste m unit (hos t) us ing a se rial po rt as the primary choic e o f co n n ec tio n. Th e sc an ner interfac e is ad aptab le to se v eral ty pe s o f ho st c onnec tio ns as s how n in Table C-4 (unsh a ...
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Compaq 4000N - page 193
Techn ical Referen ce Guid e Compaq Pers onal Computers Changed - N ovember 1996 C-19 C.3. 2.1 Pny b M od e In the parallel nib ble o r “P ny b ” mo de , the s canner tran sf ers s c ann ed inf o rmation to the sy stem unit (h o st) f o ur bits (a nib ble ) at a time using th e P3..P0 s ignals, which co n fo rm to R S-232 v o ltage and timing s ...
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Compaq 4000N - page 194
Appendix C Ke yboard Compaq Pers onal Computers Changed - N ovember 1996 C-20 C.3. 3 SCANNER SPECIFI CATIONS/REQUIREM ENTS Table C–5. Sc ann er Sp ec ific atio ns Table C-5 . Scanner S pec if icat ions Parameter Specification [1 ] Dimens ions ( Complete k eyboard unit ): Width Height Depth 20.5 in (52. 07 cm) 2.5 in (6.35 c m) 9 in (22.86 c m) We ...
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Compaq 4000N - page 195
Techn ical Referen ce Guid e Compaq Deskpro 2000 P ersonal Computers w i th MMX Tec hnology F ir s t Editi on – July 1997 I-1 INDEX I. ab b rev iations, 1- 3 ac ro ny ms , 1 -3 admin istr ator pa ssw ord, 4-44 analog- to -digital c onv erter (A DC) , D-4 APM BIOS f un ct i on s, 8-19 ar ch i tect u r e, system , 2 - 8 ASCII c h ar acter set, B-1 ...
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Compaq 4000N - page 196
Index Compaq Deskpro 2000 P ersonal Computers w i th MMX Tec hnology F ir s t Editi on – July 1997 I-2 memory , cache (SR AM), 2-10 memory , ROM (B IOS), 2-10 memory , sy stem (R AM), 2-10 mi cr opr ocesso r , Pen t i u m MMX, 3-3 MMX tech n ology , 3 - 3 monitor pow er co n t r ol, 4-46 MPEG, 6 - 2 notatio n al co nve n tions, 1- 2 Op tio ns, 2- ...
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