Atari Connection Machine
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Atari ST family connectors pinouts

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Atari ST modem 1

canon d-sub 25 Male

25 pin canon male at computer side
1 CG Shield Ground 14 Not Connected
2 TxD Transmit Data 15 Not Connected
3 RxD Receive Data 16 Not Connected
4 RTS Request to Dend 17 Not Connected
5 CTS Clear to Send 18 Not Connected
6 Not Connected 19 Not Connected
7 SG / GND System Ground 20 DTR Data Terminal Ready
8 DCD Carrier Detect 21 Not Connected
9 Not Connected 22 RI Ring Indicator
10 Not Connected 23 Not Connected
11 Not Connected 24 Not Connected
12 Not connected 25 Not Connected
13 Not Connected

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