tob@inuxa.UUCP (T Burger) (10/11/84)
The ATARI parallel bus pin-out.
This information is from the 600XL Field Service Manual.
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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
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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. Burgeroaa@houxl.UUCP (O.ALEXANDER) (10/12/84)
Am I missing something, or shouldn't there be a +5v pin somewhere to power things like external memory.