IBM 6645, 6644, 6646 manual IBM Desktop System HMM

Pin	Signal	I/O	Pin	Signal	I/O
	Name			Name
13	Host Data 2	I/O	33	Host A1	O
14	Host Data	I/O	34	No
	13			Connection
15	Host Data 1	I/O	35	Host A0	O
16	Host Data	I/O	36	Host A2	O
	14
17	Host Data 0	I/O	37	Host CS0	O
18	Host Data	I/O	38	Host CS1	O
	15
19	Ground	Power	39	ACTIVE bar	I
20	No		40	Ground
	Connection				Power

118 IBM Desktop System HMM