Commodore Amiga 500 Plus

The Amiga 500 Plus updated the best-selling A500 with 1MB Chip RAM, ECS graphics and Kickstart 2.04. Its outward similarity concealed meaningful software and hardware changes.

The short-lived model bridged the original A500 and the compact A600.

Notable Features

• The revised Agnus supports 1MB of contiguous Chip RAM.
• Kickstart 2.04 can expose compatibility problems in some older games.

Historical Significance

• The short-lived model bridged the original A500 and the compact A600.

Collector’s Notes

• Chipset and motherboard revision, Kickstart ROM, RAM expansion, accelerator cards and original keyboard or mouse 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 Amiga 500 Plus
Manufacturer	Commodore
Launched	Tuesday, January 1, 1991
Discontinued	1992
Country	United States
CPU	Motorola 68000 at approximately 7.1 MHz
Units Sold
Form Factor	Keyboard computer
Power	Internal or external mains supply according to model
Networking	Serial, parallel, MIDI and third-party Ethernet or networking options according to model
Operating System	AmigaOS 2.04
Expansion / I/O	A500 side and trapdoor expansion with ECS revisions
Keyboard	Integrated keyboard
Storage	Built-in 880KB floppy; external drives and side expansion
Sound	Paula four-channel PCM stereo
Colours	Up to 32 colours normally, 64 in EHB and 4096 in HAM on OCS/ECS; AGA models support up to 256 indexed colours and HAM8 from 24-bit palettes
Graphics	Enhanced Chip Set
Display	RGB, composite and RF output
ROM	Kickstart 2.04 ROM
RAM	1MB Chip RAM standard
CPU Speed	Approximately 7.1 MHz