Hardware

1. 1 How the Commodore 64 hides 20K of ROM inside 64K of RAM 26 Oct 2026, hardware, 1314 words Three control lines on the 6510 and one custom logic chip decide, address by address, whether the processor sees memory, firmware or the chips that draw and sing. Here is the map, the switch that rearranges it, and the tricks it made possible.