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Technical Refere nce Guide for Com paq De skpr o 4000N and 4000S Pe rs onal Co mpute rs.
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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 .
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.
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 ................................................................................
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...................................................................................................
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 .
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 .
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.
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 ..............................
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 ...................................................................
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.
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.
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.
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.
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 .
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 escrip.
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 .
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.
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.
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.
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.
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 Seri.
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.
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, M.
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 Comput.
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 .
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.
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 .
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.
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.
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.
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.
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.
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.
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 .
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 i.
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.
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.
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.
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.
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.
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.
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.
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 .
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 .
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.
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.
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.
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 .
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-.
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.
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.
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 .
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.
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.
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.
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 s.
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.
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.
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.
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.
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 .
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.
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.
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 .
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.
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.
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.
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.
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 .
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 al.
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.
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.
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.
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 Functio.
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 .
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 .
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.
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.
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 = 1.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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 .
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 de.
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.
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.
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.
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.
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.
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.
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 .
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 .
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.
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 .
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 .
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.
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 .
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.
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 .
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.
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.
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.
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 .
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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) .
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 .
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 .
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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 o.
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 bi.
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.
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 .
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.
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 P.
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.
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..
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.
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.
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 .
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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 .
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.
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/.
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 .
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 .
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.
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.
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.
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.
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.
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.
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 ss.
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.
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