IBM PS/1 Model 2011

The PS/1 Model 2011 was IBM’s return to the home-computer market with an approachable, integrated package. A ROM-based interface provided rapid access to DOS applications and help for inexperienced users.

PS/1 systems helped move IBM’s consumer PCs toward conventional compatible designs after the PCjr experiment.

Notable Features

• The original system unit received power through its matching monitor.
• A graphical ROM environment simplified initial setup and software access.

Historical Significance

• PS/1 systems helped move IBM’s consumer PCs toward conventional compatible designs after the PCjr experiment.

Collector’s Notes

• Original IBM documentation, matching display and keyboard, and an unmodified configuration add historical context.
• Memory, storage, displays and expansion hardware should be documented because configurations often changed during a system’s working life.

Specifications

Technical Information
Name	IBM PS/1 Model 2011
Manufacturer	IBM
Launched	Friday, June 1, 1990
Discontinued	1994
Country	United States
CPU	Intel 80286 at 10 MHz
Units Sold
Form Factor	Compact home desktop
Power	Monitor supplied power to the system unit
Networking	Optional modem
Operating System	IBM PC DOS with ROM-based user interface
Expansion / I/O	Serial, parallel, mouse and limited internal expansion
Keyboard	101-key keyboard
Storage	1.44MB floppy and optional hard disk
Sound	Programmable speaker
Colours	Up to 256 colours
Graphics	VGA graphics integrated into the monitor-connected system
Display	External VGA monitor
ROM	IBM PS/1 ROM interface and BIOS
RAM	1MB standard; expandable
CPU Speed	10 MHz