Last Updated or created 2022-04-01
Trying to fix a computer from my computer collection.
- RCA 1802 CPU @ 2.8 Mhz
- 32K Memory
Apparenty something wrong with the graphics chip.
The COMX uses the RCA CDP1869 and CDP1870 Video Interface System (VIS), consisting of the CDP1869 address and sound generator and the CDP1870 colour video generator.
Maybe next to try : checking signals using a Logic Analyzer