IBM PC 300GL manual IDE connectors, 42 PC 300 GL and 300 PL

IDE connectors

2 40

139

Table 23. IDE connector pin assignments

Pin	Signal	I/O	Pin	Signal	I/O
1	RESET	O	21	NC	N/A
2	Ground	N/A	22	Ground	N/A
3	Data bus bit 7	I/O	23	I/O write	O
4	Data bus bit 8	I/O	24	NC	N/A
5	Data bus bit 6	I/O	25	I/O read	O
6	Data bus bit 9	I/O	26	Ground	I
7	Data bus bit 5	I/O	27	I/O channel ready	I
8	Data bus bit 10	I/O	28	ALE	O
9	Data bus bit 4	I/O	29	NC	N/A
10	Data bus bit 11	I/O	30	Ground	N/A
11	Data bus bit 3	I/O	31	IRQ	I
12	Data bus bit 12	I/O	32	CS16#	I
13	Data bus bit 2	I/O	33	SA1	O
14	Data bus bit 13	I/O	34	PDIAG#	I
15	Data bus bit 1	I/O	35	SA0	O
16	Data bus bit 14	I/O	36	SA2	O
17	Data bus bit 0	I/O	37	CS0#	O
18	Data bus bit 15	I/O	38	CS1	O
19	Ground	N/A	39	Active#	I
20	Key (Reserved)	N/A	40	Ground	N/A

42PC 300 GL and 300 PL