[comp.sys.ibm.pc.misc] IBM bus interface question

kwf@ecersg.ncsu.edu (Ken Fernald) (09/19/90)

Hi,

can anyone provide either schematics or a reference on how
to interface to the standard IBM PC/XT/AT bus?

thanks,

--
+----------------------------+------------------------------------------------+
|    Kenneth W. Fernald      | "To recognize that nature has neither a        |
|    kwf@ecersg.ncsu.edu     |  preference for our species nor a bias against |
| North Carolina State Univ. |  it takes only a little courage" - James Randi |

bkoball@cup.portal.com (Bruce R Koball) (09/19/90)

RE: Ken Fernald's request for IBM/XT/AT bus interface specs, the best source
for this is ANNABOOKS, 12145 Alta Carmel Ct., Suite 250-262, San Diego, CA
92128, 800-/462-1042, or 619/271/9526 in CA. Specifically a 200 pg., soft-
bound book, "AT Bus Design" by Edward Solari. They've got other good
reference books as well as XT and AT BIOS's with source code.......
Bruce Koball
Motion West
2210 Sixth Street
Berkeley, CA 94710
415-540-7503
bkoball@cup.portal.com

robin@uhccux.uhcc.Hawaii.Edu (Robin Amano) (09/20/90)

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