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IBM 5150 Hardware Maintenance Manual

IBM 5150
357 pages
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If
you
received an error message,
your
Memory has a failing
module. Use
the
failing address space and module information
to
replace
the
correct module. A System Board Memory
failure will be displayed in the form
of
a four digit
alphanumeric code (such
as
OC
40)
followed by 201. This
alphanumeric code will identify the failing memory module
to
be replaced. This example is shown on the System Board
diagram. The failing module is identified by an
"X",
and is in
.1
bank 3, bit 6.
~
~~
'"t:I
---
iD
~D
DO
0
DO
0
D~
0
I:)
0
'"'
'"'
~4
~
'"'
'-
lD
00000000
0
.'.:::
::::
~D
:::
~8
::::
<e
0
~
'"
00000000
~
.....
.....
.....
'"
~
~C
'-'
'"'
~D
DDDDDD~D
00
01
02
04
08
10 20
40
80
0
0
(Second two units
of
error code)
Top View
of
System Board
WERE THE FIRST
TWO
DIGITS
OF
THE ALPHANUMERIC
CODE OTHER THAN
00,
04, 08,
or
OC?
NO Replace the failing module. See Section 3,
"Removal/Replacement. "
YES
200-3

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IBM 5150 Specifications

General IconGeneral
ProcessorIntel 8088
Clock Speed4.77 MHz
RAM16 KB - 256 KB
ManufacturerIBM
Model5150
Release Year1981
Storage5.25-inch floppy drives
GraphicsMDA or CGA
Operating SystemIBM PC DOS
PortsCassette, keyboard
Expansion Slots5

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