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Last modified 2026-01-31

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Commodore Amiga 500 Plus "A500 Plus"

A picture of Commodore Amiga 500 Plus ''A500 Plus''

SPECIFICATIONS

GENERAL
Type:16/32-bit home computer
CPU:Motorola MC68000 @ 7.09 MHz (PAL), 7.16 MHz (NTSC). Upgradeable.
Operating system(s):AmigaOS 2.0 and Workbench 2.04
Memory:ROM: 512 KB, Kickstart 2.04
RAM: 1 MB (Expandable to 8 MB or more)
Power supply:5 VDC, +12 VDC, -12 VDC (External PSU)
Current drain / power consumption:Max 4.5 A @ 5 VDC
Max 1 A @ 12 VDC
Max 100 mA @ -12 VDC
Dimensions (W*H*D):465*60*320 mm (18.3*2.36*12.6")
Weight:? Kg (? lb)




I/O
Keyboard:Integrated
Graphics: PAL:
320*256 pixels, 32 colors
640*256 pixels, 16 colors
640*512 pixels (Interlaced), ? colors
704*576 in overscan, ? colors
Palette: 4096 colors
NTSC:
320*200 pixels, 32 colors
640*200 pixels, 16 colors
640*400 pixels (Interlaced), ? colors
704*484 pixels in overscan, ? colors
Palette: 4096 colors
Audio: Four hardware-mixed channels (Two left and two right)
8-bit PCM @ sampling frequency up to 28 KHz.
Storage: Integrated 3.5" floppy (880 KB) that can also read 720 KB IBM PC disks
Optional external floppy and hard drive
External I/O ports:
Game/mouse port:   Two ?
RS-232C port:   ?
Parallel port:   ? (Centronics)
Audio out:   ? (Stereo)
Floppy I/O:   ? (Up to three extra drives)
Analog/digital RGB out:   ?
Video out:   ? (Monochrome composite)
Zorro II expansion bus:   ?
RAM expansion slot:   ?
Other:Mouse




MISCELLANEOUS
Manufactured:1991-1992 (Discontinued)
Additional info: The 2.04 version of Kickstart introduced compatibility problems with some software.
It was however possible to "downgrade" to earlier Kickstart versions.

Custom chips:
Fat Agnus - OCS / ECS display controller
Gary - System address decoder
Paula - Audio and I/O controller
Super Denise - OCS / ECS display encoder
Related documents:
Modifications and fixes:
Notable "ham" software:
Reviews:
Some options / Accessories:
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A picture of Commodore Amiga 500 Plus motherboard rev 8A