SCA     Wide SCSI
------- -------
80 pin  68 pin  cable  	function
41-44	1-16	1-31
46-73	20-34	39-67
	49-50	30,32
	54	40
	56	44	Ground
1-4	--	--	+12V
34-36	--	--	+5V
33	35	2	DB12
32	36	4	DB13
31	37	6	DB14
30	38	8	DB15
29	39	10	DBP1
28	40	12	DB0
27	41	14	DB1
26	42	16	DB2
25	43	18	DB3
24	44	20	DB4
23	45	22	DB5
22	46	24	DB6
21	47	26	DB7
20	48	28	DBP0
	     29-32 are GND
	     33-36 are TERM PWR (NC)
	     37+38 are RESERVED (NC)
	     39+40 are GND
19	55	42	ATN
	     43+44 are GND
18	57	46	BSY
17	58	48	ACK
16	59	50	RST
15	60	52	MSG
14	61	54	SEL
13	62	56	C/D 
12	63	58	REQ 
11	64	60	I/O 
10	65	62	DB8
9	66	64	DB9
8	67	66	DB10
7	68	68	DB11
37	--	--	SYNC
38	--	--	RMT_START
77	--	--	ACTIVE LED OUT
78	--	--	DLYD_START
39	--	--	SCSI ID(0)
79	--	--	SCSI ID(1)
40	--	--	SCSI ID(2)
80	--	--	SCSI ID(3)