IBM Personal Computer User Manual

Switch Setting Charts
Use the illustrations below to determine which system
board
is in your system unit.
• A 16KB-64KB system board has no identification
on the rear panel and 16KB-64KB CPU is printed
on the system board.
If you have this system board,
go to page 5-8.
• A 64KB-256KB system board has a
"B" stamped
on the rear panel and 64KB-256KB CPU printed on
the system board.
If you have this system board, go
to page 5-33.
Rear Panel
64KB-256KB CPU Stamp
No "B" stamp indicates a 16KB-64KB CPU.
o D
16KB-64KB CPU
or
64KB-256KB CPU
U~~~~D~~~~
~ ~ ~ ~ ~ 0 0 ~I ~~~ID
00000 DOD
[Q~~~~o-onO~OITD~DJ DODD 0 D D
o 00000000 DODD ODD
o 00000000 0000000
o 00000000 0
0
00000
System Board
(Top View)
Switch Settings 5-7

IBM Personal Computer Specifications

General

Manufacturer	IBM
Model	IBM Personal Computer 5150
Release Year	1981
Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Graphics	MDA or CGA
Power Supply	63.5 W
Weight	21 lbs (9.5 kg)
Storage	5.25-inch floppy disk drives, optional 10 MB hard drive
Operating System	IBM PC DOS
Ports	Parallel, Serial, Cassette