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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 ST ROM port

40 pin slot female at computer side

1	+5V		2	+5V
3	D 14		4	D 15
5	D 12		6	D 13
7	D 10		8	D 11
9	D 8		10	D 9
11	D 6		12	D 7
13	D 4		14	D 5
15	D 2		16	D 3
17	D 0		18	D 1
19	A 13		20	A 15
21	A 8		22	A 14
23	A 7		24	A 9
25	A 6		26	A 10
27	A 5		28	A 12
29	A 11		30	A 4
31	/ROM Select 3		32	A 3
33	/ROM Select 4		34	A 2
35	/UDS		36	A 1
37	/LDS		38	GND
39	GND		40	GND