Commodore Amiga 500

Configuration

  • Built: October 1989, Made in Hong Kong
  • Mainboard: Revision 6A
  • CPU: MC68000P8 (date code 8847)
  • OS: AmigaOS 1.3
  • Chipset: OCS
    • Agnus: 8372A (date code 1689)
    • Denise: 8362R8 (date code 1689)
    • Paula: 8364R7 (date code 1589)
    • Gary: 5719 (date code 1189)
  • RAM: 1 MB Chip RAM
  • SD Card floppy drive emulator

Trivia

  • Came with an original Amiga 500 cardboard box, PSU, and tank mouse.
  • Was sold as broken because the mouse pointer was not moving. It turned out that the enclosed tank mouse was broken and the Amiga itself was working fine.
  • Has a Samsung keyboard instead of the more common Mitsumi one.
  • Had an intact warranty seal when I got it.
  • This machine was intended to become heavily modified. Then I decided to refurbish it in its original state.

Restauration Works

  • Restauration started in September 2021, still in progress
  • Metal shielding and memory expansion damaged by leaking battery, fixed.
  • Replaced all electrolytic capacitors with Panasonic ones (lifetime up to 5,000 h), audio capacitors replaced with bipolar type (for enhanced audio quality).
  • R401 (mouse port power) was charred and was replaced with a 1W metal film resistor. Also preemptively replaced R408 (joystick port power).
  • Ultra low profile sockets used for 1MB Chip RAM. Unfortunately ripped off one trace, and fixed it with bodge wire.
  • Keyboard fully disassembled and cleaned.
  • Added GoEX drive and OLED display.

Known Issues

  • GoEX display is inserted, but not connected yet
  • Picture has interferences that seem to come from hardware timinig issues
  • Unable to load from GoEX drive. It makes loading noises, but does not detect a floppy.
  • Parts of the upper shell are broken out on the front left
  • Trapdoor hook broken off
  • Could need a RGB2HDMI board and HDMI connector at the floppy button

History

  • 2024-06-30
    • Reassembled the keyboard
    • Put original Denise and ROM back into the mainboard
    • Added the GoEX drive that was planned for this machine from the beginning
    • Reassembled the machine
    • Test run showed issues
  • 2024-06-29
    • Whitened the case and keyboard in the sun
  • 2024-06-12
    • Disassembled the case and cleaned it
    • Disassembled the keyboard and cleaned it
  • 2024-06-09
    • Retrieved case and keyboard from storage
  • 2022-01-08
    • Replaced wrong sockets with ultra low profile ones. Damaged a trace while removing a socket, fixed with bodge wire.
  • 2021-12-05
    • Recapped (used bipolar caps for audio path)
    • Added sockets for internal RAM extension slots
  • 2021-11-14
    • Repaired battery damage on trapdoor RTC/Memory Expansion board
  • 2021-11-01
    • Battery of the RTC trapdoor module has leaked. Assessed the damage.
    • Disassembling. Case and Samsung keyboard is stored.
    • Removed battery damage from shielding.
    • Polished flash rust from shielding.
    • Replaced burnt R401 (and preemptively also R408)
  • 2021-10-14: Date of purchase