IBM Personal Computer 5150

The IBM Personal Computer model 5150, commonly known as the IBM PC, is the original version and progenitor of the IBM PC compatible hardware platform. It was created by a team of engineers and designers under the direction of Don Estridge of the IBM Entry Systems Division in Boca Raton, Florida.

Specification

All models featured:

• Intel 8088 CPU at 4.77MHz
• Socket for Intel 8087 Math Coprocessor
• IBM Personal Computer System Board with 5 ISA slots
• 63W PSU
• Parallel and serial ports
• Cassette deck port
• ROM BASIC and free ROM socket for custom ROM
• Substantial case with two full-hieght 5¼" drive bays

A choice of either Colour Graphics or Monochrome display adapters were available, the former with a composite output for connection to an ordinary TV.

The vast majority of models shipped had at least one floppy drive, for which IBM used three models:

• Tandom TM100

Models

The 5150 was produced from 12th August 1981 to 1st April 1987 in a number of configurations:

Model Number	83-key Keyboard	RAM	5¼" Floppy Drives	Motherboard
1	Y	16KB	None	16/64KB
14	Y	64KB	1x160KB	16/64KB
64	Y	64KB	1x360KB	16/64KB
74	Y	64KB	2x360KB	16/64KB
104	Y	64KB	None	64/256KB
114	Y	64KB	1x160KB	64/256KB
164	Y	64KB	1x360KB	64/256KB
166	Y	256KB	1x360KB	64/256KB
174	Y	64KB	2x360KB	64/256KB
176	Y	256KB	2x360KB	64/256KB
813	Y	48KB	1x160KB	16/64KB
824	Y	64KB	2x160KB	16/64KB
X14	N	64KB	1x360KB	64/256KB
X64	N	64KB	1x360KB	64/256KB
X74	N	64KB	2x360KB	64/256KB
X66	N	256KB	1x360KB	64/256KB
X76	N	256KB	2x360KB	64/256KB

Reference Materials

• IBM 5150 Guide to Operations (Aug-81)
• IBM 5150 Guide to Operations (Apr-84)
• IBM 5150 Hardware Maintenance and Service
• IBM 5150 Technical Reference (Aug-81)
• IBM 5150 Technical Reference (Apr-84)

Disk Images

• IBM PC-DOS:
  • PC-DOS v1.0
  • PC-DOS v2.0
  • PC-DOS v2.1

See Also

• IBM Personal Computer Series