IBM Personal Computer User Manual

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128K
Total Memory
64K
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System Board
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Switch
Block 1
Switch
Block 2
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64K
Option
32K
Option
Card
Switches
Card
Switches
Card
Switches
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with
64K
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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