Commodore PC-1

The Commodore PC-1 placed an XT-compatible computer in a compact enclosure visually influenced by the Commodore 128.

Its unusual size and external hard-disk and expansion modules distinguish it from generic desktop clones.

Notable Features

• The slim case has no normal internal hard-disk bay.
• Optional PC1 expansion units add a 20MB disk, networking or ISA slots.

Historical Significance

• Its unusual size and external hard-disk and expansion modules distinguish it from generic desktop clones.

Collector’s Notes

• Model suffix, motherboard revision, supplied display adapter, drives and original Commodore keyboard should be documented.
• Memory, storage, displays and expansion hardware should be documented because configurations often changed during a system’s working life.

Specifications

Technical Information
Name	Commodore PC-1
Manufacturer	Commodore
Launched	Thursday, January 1, 1987
Discontinued	1990s
Country	West Germany
CPU	Intel 8088-compatible processor
Units Sold
Form Factor	Compact low-profile PC
Power	Internal mains supply or battery/adapter for portable models
Networking	Optional modem, serial networking and Ethernet or Token Ring adapters
Operating System	Commodore MS-DOS and compatible PC operating systems
Expansion / I/O	ISA expansion, serial, parallel, video and storage interfaces; exact complement varies
Keyboard	Detached PC-style keyboard
Storage	Internal 3.5-inch floppy; external PC 1-20 hard-disk unit optional
Sound	PC speaker; optional sound cards
Colours	Adapter-dependent colour
Graphics	Integrated PC-compatible graphics
Display	External monochrome or colour monitor
ROM	IBM-compatible BIOS ROM
RAM	512KB–640KB
CPU Speed	Approximately 4.77–10 MHz depending on revision