CONNECTOR J1 PIN OUT
FOR VF II S-100 Bus

PIN #	SIGNAL NAME	DIRECTION	DESCRIPTION
1	+8V to 10V	Input	Power
2	+14V to 20V	Input	Power
6	VI2*	Output
7	VI3*	Output
24	PHI 2	Input	Phase 2 clock
25	PHI 1	Input	Phase 1 clock
79,80,81,31,30,29,82,83	A0-A7	Output	Address bus bits 0-7
36,35,88,89,38,39,40,90	DO-0 to DO-7	Output	Data bus in
95,94,41,42,91,92,93,43	DI-0 to DI-7	Input	Data bus out
45	sOUT	Input	
46	sINP	Input	
72	pRDY	Output	Ready
77	pWR*	Input
78	pDBIN	Input	Data bus in
99	POC*	Input	Power on Clear
100	GROUND	Input	Ground

IO Ports
60	Reset	Output
63	Port 63 State	Input
63	Drive 0	Output
63	Drive 1	Output
63	Drive 2	Output
63	Drive 3	Output
63	Side	Output
63	Size	Output
63	Density	Output
63	Wait	Output
64	Command	Output
64	Status	Input
65	Track	Output
66	Sector	Output
67	Data Write	Output
67	Data Read	Input

J2
6	(Drive Sel 3*)
8	IP*	Input
10	Drive Sel 0*	Output
12	Drive Sel 1*	Output
14	Drive Sel 2*	Output
16	Motor On	Output
18	DIR*	Output
20	STEP*	Output
22	WRT DATA*	Output
24	WRT GATE*	Output
26	TRK0*		Input
28	WRT PROT*	Input
30	RD DATA*	Input
32	Side Sel*	Output

J3
6	GT43*	Output
14	Side Sel*	Output
16	In Use	Output
18	HLD*		Output
20	IP*	Input
22	READY*	Input
26	Drive Sel 1*	Output
28	Drive Sel 2*	Output
30	Drive Sel 3*	Output
32	Drive Sel 4*	Output
34	DIR*	Output
36	STEP*	Output
38	WRT DATA*	Output
40	WRT GATE*	Output
42	TRK0*		Input
44	WRT PROT*	Input
46	RD DATA*	Input
50	Ground