SCSI-II External Hi D-Sub (Single-ended)

Pinout

50 PIN HI-DENSITY D-SUB FEMALE at the controller & devices.

50 PIN HI-DENSITY D-SUB MALE at the cable.

Pin	Name	Dir	Description
1-25	GND	─	Ground
26	DB0	↔	Data Bus 0
27	DB1	↔	Data Bus 1
28	DB2	↔	Data Bus 2
29	DB3	↔	Data Bus 3
30	DB4	↔	Data Bus 4
31	DB5	↔	Data Bus 5
32	DB6	↔	Data Bus 6
33	DB7	↔	Data Bus 7
34	PARITY	↔	Data Parity (odd Parity)
35	GND	─	Ground
36	GND	─	Ground
37	GND	─	Ground
38	TMPWR	↔	Termination Power
39	GND	─	Ground
40	GND	─	Ground
41	/ATN	←	Attention
42	n/c	-	Not connected
43	/BSY	↔	Busy
44	/ACK	←	Acknowledge
45	/RST	↔	Reset
46	/MSG	→	Message
47	/SEL	↔	Select
48	/C/D	→	Control/Data
49	/REQ	→	Request
50	/I/O	→	Input/Output

Note: Direction is Device relative Bus (other Devices).