IBM PS/1 User Manual

Hardware Compatibility
IBM PS/1 Computers, Machine Types 2133, 2155, and 2168, are designed
to maintain compatibility with adapters, options, and drives that fully support
the following interfaces and physically fit into the system unit.
Item Interface
Hard Disk
Drives
AT IDE Interface (CAM compatible)
I/O Adapter
Cards
Adapters that are IBM AT compatible and operate at 8MHz
Diskette
Drives
AT Interface
Math
Coprocessor
Intel** or equivalent
Video Display Type
VGA
VGA
VGA
VGA
SVGA
SVGA
SVGA
SVGA
SVGA
SGA+
Resolution
640×480
640×480
640×480
640×480
800×600
800×600
800×600
1024×768
1024×768
1280×1024
Colors
16
256
65,535
16,777,216
16
256
65,535
16
256
16
Video Memory
256K
512K
1024K
1024K
256K
512K
1024K
512K
1024K
1024K
Note:
1. SVGA supports all resolutions and colors supported by VGA. SVGA+ sup-
ports all resolutions and colors supported by SVGA.
2. Physical interface is compatible with IBM’s Personal System/2* (PS/2*) VGA
interface.
Serial 9-pin connector with RS232D electrical interface
Parallel Bidirectional
Pointing
Device
IBM PS/2-compatible mouse
Keyboard
Device
IBM PS/2-compatible enhanced keyboard
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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