IBM 5150 Hardware Maintenance Manual

If the first two characters of the error code are other than 00,
04, 08,
or OC, the failing Memory Expansion Option should
be replaced.
If there is more than one Memory Expansion
Option, use the following table
to establish the failing option.
THE CARD WITH THE SWITCH SETTINGS
CORRESPONDING TO THE FIRST
TWO CHARACTERS (',
OF THE ERROR CODE IS THE FAILING CARD.
32KB
First two units Expansion option
of the error code
switch settings
2
3 4 5
10 or 14
On
On
On
Off On
18 or lC
On On
On Off
Off
20
or 24
On On
Off On On
28
or 2C
On On
Off On Off
30 or 34
On On
Off Off On
38
or 3C
On On
Off Off Off
64KB
First two units
Expansion option
of the error code
switch settings
1
2
3
4
5
10 or 14
On
On On Off
N/A
18 or lC
On
On On Off
N/A
20
or 24
On
On Off On
N/A
28
or 2C
On On
Off On
N/A
30 or 34
On On
Off Off
N/A
38
or 3C On On
Off Off
N/A
Refer to the table above and replace the appropriate
expansion card.
200-4

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5