Atari Connection Machine
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Atari ST family connectors pinouts

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Atari TT SCSI

canon d-sub 25 Female

25 pin canon female at computer side
1 /REQ Request 14 GND
2 /MSG Message 15 C/D Control Data
3 I/O Input / Output 16 GND
4 /RST Reset 17 /ATN Attention
5 /ACK Acknowledge 18 GND
6 /BSY Busy 19 *SEL Select
7 GND 20 PARITY Data parity
8 Data 0 21 Data 1
9 GND 22 Data 2
10 Data 3 23 Data 4
11 Data 5 24 GND
12 Data 6 25 Not used
13 Data 7

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