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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/TT ACSI DMA port

19 pin canon female at computer side

1	Data 0		11	GND
2	Data 1		12	Reset
3	Data 2		13	GND
4	Data 3		14	Acknowledge
5	Data 4		15	GND
6	Data 5		16	A 1
7	Data 6		17	GND
8	Data 7		18	Read/Write
9	Chip Select		19	Data Request
10	Interrupt Request

Atari ACSI internal in MEGA ST

Atari ACSI internal in MEGA STE