🚀 go-pugleaf

The ATARI parallel bus pin-out.

This information is from the 600XL Field Service Manual.

                                  -----------
                             GND  |  1    2 |  EXTERNAL SELECT
                             A0   |  3    4 |  A1
                             A2   |  5    6 |  A3
                             A4   |  7    8 |  A5
                             A6   |  9   10 |  GND
                             A7   | 11   12 |  A8
                             A9   | 13   14 |  A10
                             A11  | 15   16 |  A12
                             A13  | 17   18 |  A14
                             GND  | 19   20 |  A15
                             D0   | 21   22 |  D1
                             D2   | 23   24 |  D3
                             D4   | 25   26 |  D5
                             D6   | 27   28 |  D7
                             GND  | 29   30 |  GND
            PHASE 2 CLOCK OUTPUT  | 31   32 |  GND
                             N/C  | 33   34 |  RESET OUTPUT
                             IRQ  | 35   36 |  READY INPUT
                             N/C  | 37   38 |  EXTERNAL DECODER OUTPUT
                             N/C  | 39   40 |  REFRESH OUTPUT
           COLUMN ADDRESS OUTPUT  | 41   42 |  GND
         MATH PACK DISABLE INPUT  | 43   44 |  ROW ADDRESS STROBE OUTPUT
                             GND  | 45   46 |  LATCHER READ/WRITE OUTPUT
                             N/C  | 47   48 |  N/C
                        AUDIO IN  | 49   50 |  GND
                                  -----------





To locate pin 1, 
	while looking at the back of the unit, pin 1 is on the top right side.


This is the only information I have.
NO!! I don't know anymore about the use of the pins.
NO! I don't know if the pinout is the EXACT same on the 800XL.


This is the only page of the Field Service Manual I have.  I recieved it 
from Atari on special request.

Does anybody know any more about the bus??

I will post a summary of any replies I get.


Ted O. Burger