From: cmv@cbnewsc.ATT.COM (C M Votava) Newsgroups: unix-pc.general Subject: Bus Lines Date: 31 Oct 89 03:40:08 GMT Reply-To: cmv@cbnewsc.ATT.COM (C M Votava) Organization: AT&T Bell Laboratories I've recently been told that many of the articles that I've tried to post over the past few months never made it out of this machine. This was not due to a problem with the machine, but to stupidity on my part. It's amazing what you can do when you read the instructions. In any case, here's a tidbit that some of you folks may find useful. Below are 2 lists. One list is a description of the motherboard bus connector (that's the gold plated connectors that are actually on the motherboard). The second is the expansion bus connectors as any expansion card would see them. I have verified a good number of them, but please double check anything you can if you plan to use them for something. As always, watch out for spelling errors and typo's. Unixpc Motherboard Bus Pinouts Bus Connector Sheet Number Number Symbol Description ======================================================================== JX-1 21 Digital Ground JX-2 21 +5v JX-3 21 Analog Ground JX-4 22 XI/OEN+ Expansion I/O Enable JX-5 22 Audio From Tape JX-6 17 XPERR Expansion Parity Error JX-7 22 Audio From Phone Line JX-8 21 Digital Ground JX-9 21 Digital Ground JX-10 22 INT01* Interrupt 1 JX-11 22 Audio To Phone Line JX-12 22 INT05* Interrupt 5 JX-13 21 Digital Ground JX-14 21 +5v JX-15 22 XPCK+ Expansion Processor Clock JX-16 21 +12v JX-17 21 Digital Ground JX-18 21 +12v JX-19 22 X20MCK+ ?? Expansion Modem Clock ?? JX-20 21 XLDS Expansion Lower Data Strobe JX-21 21 Digital Ground JX-22 21 -12v JX-23 22 XMEM+ Expansion Memory JX-24 21 XUDS Expansion Upper Data Strobe JX-25 22 XENRAS* Expansion Enable Row Address Strobe JX-26 21 XR/W Expansion Read/Write JX-27 22 SPARE0 Spare JX-28 22 XRST* Expansion Reset JX-29 21 Digital Ground JX-30 21 +5v JX-31 21 +5v JX-32 22 RFBG* Refresh Bus Grant JX-33 22 EXP1BG* Expansion Board 1 Bus Grant JX-34 22 EXP2BG* Expansion Board 2 Bus Grant JX-35 22 EXP0BG* Expansion Board 0 Bus Grant JX-36 21 Digital Ground JX-37 22 EXP2RQ* Expansion Board 2 Bus Request JX-38 22 SPARE1 Spare JX-39 22 EXP0RQ* Expansion Board 0 Bus Request JX-40 22 EXP1RQ* Expansion Board 1 Bus Request JX-41 21 +5v JX-42 21 XD15 Expansion Data Bus JX-43 21 Digital Ground JX-44 21 XD14 Expansion Data Bus JX-45 21 XD13 Expansion Data Bus JX-46 21 XD12 Expansion Data Bus JX-47 21 XD11 Expansion Data Bus JX-48 21 XD10 Expansion Data Bus JX-49 21 XD09 Expansion Data Bus JX-50 21 Digital Ground JX-51 21 XD07 Expansion Data Bus JX-52 21 XD08 Expansion Data Bus JX-53 21 XD05 Expansion Data Bus JX-54 21 XD06 Expansion Data Bus JX-55 21 XD03 Expansion Data Bus JX-56 21 XD04 Expansion Data Bus JX-57 21 Digital Ground JX-58 21 +5v JX-59 21 XD02 Expansion Data Bus JX-60 21 XD01 Expansion Data Bus JX-61 21 XD00 Expansion Data Bus JX-62 22 XMA20 Expansion Mapped Address Bits JX-63 22 XMA19 Expansion Mapped Address Bits JX-64 21 Digital Ground JX-65 22 XMA18 Expansion Mapped Address Bits JX-66 22 XMA17 Expansion Mapped Address Bits JX-67 22 XMA16 Expansion Mapped Address Bits JX-68 22 XMA15 Expansion Mapped Address Bits JX-69 21 +5v JX-70 22 XMA14 Expansion Mapped Address Bits JX-71 21 Digital Ground JX-72 22 XMA13 Expansion Mapped Address Bits JX-73 22 XMA12 Expansion Mapped Address Bits JX-74 21 XA21 Expansion Address Bus JX-75 21 XA20 Expansion Address Bus JX-76 21 XA19 Expansion Address Bus JX-77 21 XA18 Expansion Address Bus JX-78 21 Digital Ground JX-79 21 XA17 Expansion Address Bus JX-80 21 XA16 Expansion Address Bus JX-81 21 XA15 Expansion Address Bus JX-82 21 XA14 Expansion Address Bus JX-83 21 XA13 Expansion Address Bus JX-84 21 XA12 Expansion Address Bus JX-85 21 Digital Ground JX-86 21 +5v JX-87 21 XA11 Expansion Address Bus JX-88 21 XA10 Expansion Address Bus JX-89 21 XA09 Expansion Address Bus JX-90 21 XA08 Expansion Address Bus JX-91 21 XA07 Expansion Address Bus JX-92 21 Digital Ground JX-93 22 XBP+ Expansion Bus Parity Result JX-94 21 XA06 Expansion Address Bus JX-95 21 XA05 Expansion Address Bus JX-96 21 XA04 Expansion Address Bus JX-97 21 XA03 Expansion Address Bus JX-98 21 XA02 Expansion Address Bus JX-99 21 Digital Ground JX-100 21 XA01 Expansion Address Bus Unixpc Expansion Bus Pinouts The bus connector number can be J1 J2 or J3 (or maybe it's J0 J1 or J2, well you get the picture) indicating if it's expansion slot 1 2 or 3 (0 1 or 2). Places where it's particular to a given slot is noted. Bus Connector Number Symbol Description ======================================================================== J?-01 -12VDC -12vdc J?-02 INT05* Interrupt 5 J?-03 +5VDC +5vdc J?-04 GND Digital Ground J?-05 GND Digital Ground J?-06 +5VDC +5vdc J?-07 GND Digital Ground J?-08 GND Digital Ground J?-09 +5VDC +5vdc J?-10 GND Digital Ground J?-11 GND Digital Ground J?-12 +5VDC +5vdc J?-13 GND Digital Ground J?-14 GND Digital Ground J?-15 +5VDC +5vdc J?-16 EXP?BG* (EXP0BG* EXP1BG* EXP2BG*) J?-17 EXP?RQ* (EXP0RQ* EXP1RQ* EXP2RQ*) J?-18 GND Digital Ground J?-19 GND Digital Ground J?-20 +5VDC +5vdc J?-21 GND Digital Ground J?-22 GND Digital Ground J?-23 +5VDC +5vdc J?-24 GND Digital Ground J?-25 GND Digital Ground J?-26 +5VDC +5vdc J?-27 GND Digital Ground J?-28 ID2 (1,2,3 GND) J?-29 ID1 (1,2 GND, 3 +5VDC) J?-30 ID0 (1,3 GND, 2 +5VDC) J?-31 XBP+ Expansion Bus Parity Result J?-32 GND Digital Ground J?-33 GND Digital Ground J?-34 +12VDC +12vdc J?-35 XI/OEN* Expansion I/O Enable J?-36 XENRAS* Expansion Enable Row Address Strobe J?-37 XPERR* Expansion Parity Error J?-38 XLDS* Expansion Lower Data Strobe J?-39 XRST* Expansion Reset J?-40 XPCK* Expansion Processor Clock J?-41 X20MCK+ ?? Expansion Modem Clock ?? J?-42 Analog Ground J?-43 Audio From Tape J?-44 Audio From Phone Line J?-45 Audio To Phone Line J?-46 XD07 Expansion Data Bus J?-47 XD06 Expansion Data Bus J?-48 XD05 Expansion Data Bus J?-49 XD04 Expansion Data Bus J?-50 XD03 Expansion Data Bus J?-51 XD02 Expansion Data Bus J?-52 XD01 Expansion Data Bus J?-53 XD00 Expansion Data Bus J?-54 XA21 Expansion Address Bus J?-55 XA20 Expansion Address Bus J?-56 XA19 Expansion Address Bus J?-57 XA18 Expansion Address Bus J?-58 XA17 Expansion Address Bus J?-59 XA16 Expansion Address Bus J?-60 XA15 Expansion Address Bus J?-61 XA14 Expansion Address Bus J?-62 XA13 Expansion Address Bus J?-63 XA12 Expansion Address Bus J?-64 XA11 Expansion Address Bus J?-65 XA10 Expansion Address Bus J?-66 XA09 Expansion Address Bus J?-67 +12VDC +12vdc J?-68 XR/W* Expansion Read/Write J?-69 INT01* Interrupt 01 J?-70 XUDS* Expansion Upper Data Strobe J?-71 SPARE1 Spare J?-72 XMEM+ Expansion Memory J?-73 SPARE0 Spare J?-74 XRFBG* Expansion Refresh Bus Grant J?-75 XD15 Expansion Data Bus J?-76 XD14 Expansion Data Bus J?-77 XD13 Expansion Data Bus J?-78 XD12 Expansion Data Bus J?-79 XD11 Expansion Data Bus J?-80 XD10 Expansion Data Bus J?-81 XD09 Expansion Data Bus J?-82 XD08 Expansion Data Bus J?-83 XMA20 Expansion Mapped Address Bits J?-84 XMA19 Expansion Mapped Address Bits J?-85 XMA18 Expansion Mapped Address Bits J?-86 XMA17 Expansion Mapped Address Bits J?-87 XMA16 Expansion Mapped Address Bits J?-88 XMA15 Expansion Mapped Address Bits J?-89 XMA14 Expansion Mapped Address Bits J?-90 XMA13 Expansion Mapped Address Bits J?-91 XMA12 Expansion Mapped Address Bits J?-92 XA08 Expansion Address Bus J?-93 XA07 Expansion Address Bus J?-94 XA06 Expansion Address Bus J?-95 XA05 Expansion Address Bus J?-96 XA04 Expansion Address Bus J?-97 XA03 Expansion Address Bus J?-98 XA02 Expansion Address Bus J?-99 XA01 Expansion Address Bus Have Fun! -Craig Votava att!cbnewsc!cmv att!ihlpf!cmv att!ihlpm!cmv