IBM PS/1 User Manual

SIMM—30 Pin
Pin Signal Name I/O Pin Signal Name I/O
1 +5 V dc I 16 D4 I/O
2 CAS O 17 A8 O
3 D0 I/O 18 A9 O
4 A0 O 19 A10 O
5 A1 O 20 D5 I/O
6 D1 I/O 21 WE O
7 A2 O 22 Ground
8 A3 O 23 D6 I/O
9 Ground 24 No Connection
10 D2 I/O 25 D7 I/O
11 A4 O 26 DP Out I
12 A5 O 27 RAS O
13 D3 I/O 28 CASP O
14 A6 O 29 DP In O
15 A7 O 30 +5 V dc I
Parts/Test Point Locations 5-29

IBM PS/1 Specifications

General

Processor	Intel 80286 or 80386
Processor Speed	10 MHz (80286)
RAM	1 MB (expandable to 2 MB or more)
Storage	40 MB hard drive
Floppy Drive	3.5" 1.44 MB
Graphics	VGA
Ports	Serial, Parallel, Mouse