Commodore 900 / C900 / Z-8000 [Prototype]

• spare mainboard. Working.
• all ICs socket replaced with identical new ones. Standard with standard, precision with precision. Optically absulute identical to the original ones.
• not in this picture: missing three-wired power cable to the keyboard ciruit replaced.
• crusty totally corroded ROM legs made shiny again with acid, a glass fibre pen and some sandpaper.