✓ VERIFIED

IBM PS/1

2011 · 1990–1994 · desktop

Specifications

Cpu: Intel 80286, 10 MHz
Ram: max: 2.5 MB via a proprietary IBM memory expansion module · base: 512 KB to 1 MB on the system board
Ports: Serial · Parallel · PS/2 keyboard · PS/2 mouse · VGA out · Built-in 2400 baud modem (US models)
Display: Bundled 12" or 14" color CRT monitor, onboard VGA graphics
Storage: base: One 3.5" 1.44 MB floppy drive, no hard drive standard · options: 30 MB internal hard drive
Os Support: latest: PC DOS 5.0, Windows 3.0 on later 386 and 486 based PS/1 revisions · shipped: PC DOS 4.01 built into ROM, with a menu-driven setup and bundled software
Release Price: $999 (diskette-only configuration) to $1,999 (hard drive configuration)

Variants

Revisions

PS/1 386SX1991, Intel 386SX based revision, faster than the launch 286 model

PS/1 486SX1993, Intel 486SX based revision, final generation before the line folded into Aptiva

Upgrade paths

RAM

2.5 MB via IBM's proprietary memory expansion module · The PS/1 used a non-standard memory module shared with some early Aptiva boards, making generic SIMM upgrades difficult.

MODERATE

storage

Internal 30 MB hard drive, factory option only, no user-documented aftermarket path on the base 286 board · The compact case and proprietary drive mounting made third-party hard drive swaps impractical on launch units.

HARD

CPU

Locked to the socketed 80286 on the original 2011 board · No official CPU upgrade path existed for the launch 286-based PS/1; later PS/1 generations used entirely different 386 and 486 boards instead.

LOCKED