IBM PC 300GL manual Diskette drive connector pin assignments Pin Signal, MSEN0, MSEN1

Diskette drive connector

2 34

133

Table 24. Diskette drive connector pin assignments

Pin	Signal	I/O	Pin	Signal	I/O
1	Drive 2 installed #	I	18	Direction in#	O
2	High density	O	19	Ground	N/A
	select
3	Not connected	N/A	20	Step#	O
4	Not connected	N/A	21	Ground	N/A
5	Ground	N/A	22	Write data #	O
6	Data rate 0	N/A	23	Ground	N/A
7	Ground	N/A	24	Write enable#	O
8	Index#	I	25	Ground	N/A
9	Reserved	N/A	26	Track0#	I
10	Motor enable 0#	O	27	MSEN0	I
11	Ground	N/A	28	Write protect#	I
12	Drive select 1#	O	29	Ground	N/A
13	Ground	N/A	30	Read data#	I
14	Drive select 0#	O	31	Ground	N/A
15	Ground	N/A	32	Head 1 select#	O
16	Motor enable 1#	O	33	Data rate 1	N/A
17	MSEN1	I	34	Diskette change#	I

Appendix A. Connector pin assignments 43