A short video testing the Rockwell 6502, and a Rockwell 6522. The 6522 needs modification on the IRQ pin. The video also covers use of a new 32Kb RAM expansion, and loading cart games into RAM.
Dave Curran – http://blog.tynemouthsoftware.co.uk/
VIC-20 Memory Map – http://retroinformatica.altervista.org/vic20memory.pdf
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