December Days 2021 #5: SID Rock

[Welcome to December Days, where I natter on about things organized around a theme (sometimes very loosely), one a day, for 31 days. This year, we're taking a look back at some touchpoints along the way of my journey with computing and computing devices.]

• CPU: MOS Technology 6510/8500 @ 1.023 MHz


• Memory: 64 KB RAM + 20 KB ROM


• Graphics: VIC-II (320×200, 16 colors, sprites, raster interrupt)


• Sound: SID 6581/8580 (3× osc, 4× wave, filter, ADSR, ring)


• Inputs/Outputs: 2× CIA 6526 (joystick, GPIO/RS-232/keyboard), ROM cartridge, Serial IEEE 488 bus (floppy disk/printer) Digital tape


• OS: Commodore KERNAL/BASIC 2.0, GEOS (optionally)

( The Commodore 64 )