IBM PC

IBM PC™ (Personal Computer), is a trademark of IBM. The predecessor of the current personal computers and progenitor of the IBM PC compatible hardware platform, it was introduced in August 1981. The original model was designated the IBM 5150. It was created by a team of 12 engineers and designers under the direction of Don Estridge of the IBM Entry Systems Division. The introduction of the PC changed the world of IBM in 1981.

IBM PC and PS/2 models

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The IBM PC range :

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Model nameIntroducedCPUFeatures

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

PCAug 19818088Floppy disk system

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

XTMar 19838088Slow hard disk

Related Topics:
XT - Hard disk

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

XT/370Oct 19838088System/370 mainframe emulation

Related Topics:
System/370 - Mainframe - Emulation

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

3270 PCOct 19838088With 3270 terminal emulation

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

PCjrNov 19838088Floppy-based home computer

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

PC PortableFeb 19848088Floppy-based portable

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

ATAug 1984286Medium-speed hard disk

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

ConvertibleApr 19868088Microfloppy laptop portable

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

XT 286Sep 1986286Slow hard disk, but zero wait state memory on the motherboard. This 6mhz machine was actually faster than the 8mhz ATs (when using planar memory) because of the zero wait states

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The PS/2 series :

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

ModelIntroducedCPUFeatures

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

25August 19878086PC bus (limited expansion)

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

30April 19878086PC bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

30August 1987286PC bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

50April 1987286Micro Channel Architecture bus

Related Topics:
Micro Channel Architecture - Bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

50ZJune 1988286Faster Model 50

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

55 SXMay 1989386SXMCA bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

60April 1987286MCA bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

70June 1988386Desktop, MCA bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

P70May 1989386Portable, MCA bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

80April 1987386Tower, MCA bus

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

IBM PC compatible specifications :

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

CPUClock speed (MHz)CPU bus width (bits)System Bus width (bits)RAM (megabytes)Floppydisk driveHard drive (megabytes)Operatingsystem

Related Topics:
Bits - Megabytes - Floppy
disk drive - Hard drive - Operating
system

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

80884.77–9.51681  (1)5.25, 360K3.5, 720K3.5, 1.44M10–40PC-DOS

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

80866–121620–60

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

2866–251–8  (1)5.25, 360K5.25, 1.2MB 20–300PC-DOS, OS/2

Related Topics:
PC-DOS - OS/2

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

38616–3332321–16  (2)3.5, 720K3.5, 1.44MB 40–600UNIX

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

386SX16

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

• Under DOS, RAM is expanded beyond 1M with EMS memory boards
• Under DOS, RAM is expanded beyond 1M with normal "extended" memory and a memory management program.