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Atari ST family connectors pinouts

• ST power supply
• ST floppy power supply


• ST Monitor out
• TT Monitor out
• Falcon Monitor out


• ST joystick / mouse
• STe enhanced joystick
• MEGA ST/TT keyboard


• MIDI In and Out
• ST Modem 1
• Falcon Serial
• LAN


• ST/Falcon parallel


• ST floppy
• Floppy internal
• ST/TT DMA ACSI port
• TT SCSI port


• ROM port


• Falcon DSP port

Atari ST modem 1

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