Instruction/ maintenance manual of the product 4000N Compaq
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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.
An important point after buying a device Compaq 4000N (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Compaq 4000N yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Compaq 4000N - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Compaq 4000N you will learn all the available features of the product, as well as information on its operation. The information that you get Compaq 4000N will certainly help you make a decision on the purchase.
If you already are a holder of Compaq 4000N, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Compaq 4000N.
However, one of the most important roles played by the user manual is to help in solving problems with Compaq 4000N. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Compaq 4000N along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
