Xref: utzoo comp.sys.ibm.pc.misc:1827 sci.electronics:14488
Path: utzoo!attcan!uunet!munnari.oz.au!uhccux!robin
From: robin@uhccux.uhcc.Hawaii.Edu (Robin Amano)
Newsgroups: comp.sys.ibm.pc.misc,sci.electronics
Subject: Re: IBM bus interface question
Message-ID: <9457@uhccux.uhcc.Hawaii.Edu>
Date: 19 Sep 90 19:13:16 GMT
References: <1990Sep18.193839.4827@ncsuvx.ncsu.edu>
Reply-To: robin@uhccux.UUCP (Robin Amano)
Followup-To: comp.sys.ibm.pc
Organization: University of Hawaii
Lines: 48

In article <1990Sep18.193839.4827@ncsuvx.ncsu.edu> kwf@ecersg.ncsu.edu (Ken Fernald) writes:
>Hi,
>
>can anyone provide either schematics or a reference on how
>to interface to the standard IBM PC/XT/AT bus?

IBM XT bus:

     __________
A1    I/O CH CLK            B1    GND
A2    D7                    B2    RESET DRV
A3    D6                    B3    5V
A4    D5                    B4    IRQ2
A5    D4                    B5    -4.93V
A6    D3                    B6    DRQ2
A7    D2                    B7    -11.88V
A8    D1                    B8    RESERVED
A9    D0                    B9    12.00V
A10   I/O CH RDY            B10   GND
                                  ____
A11   AEN                   B11   MEMW
                                  ____
A12   A19                   B12   MEMR
                                  ___
A13   A18                   B13   IOW
                                  ___ 
A14   A17                   B14   IOR
                                  _____
A15   A16                   B15   DACK3
A16   A15                   B16   DRQ3
                                  _____
A17   A14                   B17   DACK1
A18   A13                   B18   DRQ1
                                  _____
A19   A12                   B19   DACK0
A20   A11                   B20   CLK
A21   A10                   B21   IRQ7
A22   A9                    B22   IRQ6
A23   A8                    B23   IRQ5
A24   A7                    B24   IRQ4
A25   A6                    B25   IRQ3
                                  _____
A26   A5                    B26   DACK2
A27   A4                    B27   T/C
A28   A3                    B28   ALE
A29   A2                    B29   5.00V
A30   A1                    B30   OSC
A31   A0                    B31   GND