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Atari ST family connectors pinouts

• ST power supply
• ST floppy drive 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
• ST Floppy internal
• ST floppy drive IN and OUT
• ST/TT DMA ACSI port
• TT SCSI port


• ROM port


• Falcon DSP port

Atari TT SCSI

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