RS232C CD FIRQ Interrupt control and flag RS232 Data Input / Output :: Serial Printers :: Modems :: DLOAD :: Digitizer :: Drivewire MC6821 / MC6822 Peripheral Interface Adapter ( PIA1) Keyboard :: keyscn Keyboard and Joystick ButtonsĪudio Multiplexer Control / Joystick Select MC6821 / MC6822 Peripheral Interface Adapter ( PIA0
128K CoCo3: 3 Mirrors of MMU Blocks 30-37ĬoCo 3 Super Extended BASIC High Resolution Graphics ĬoCo 3 Super Extended BASIC HGET/HPUT buffersīASIC program space or Semigraphics / PMODE graphics buffersĨK Cartridge ROM or 16K Cartridge lower 8K bank
