name: 8580 function: Audio Output package: 40 Pin DIL,28 manufacturer: MosTek added-by: Rob Gill comment: Sound chip used in later commodore 64 computers +--()--+ CAP1A | 1 28| Vdd CAP1B | 2 27| Audio Out CAP2A | 3 26| Ext In AP2B | 4 25| Vcc /RES | 5 24| POT X CLK | 6 23| POT Y R/W | 7 22| D7 /CS | 8 21| D6 A0 | 9 20| D5 A1 |10 19| D4 A2 |11 18| D3 A3 |12 17| D2 A4 |13 16| D1 GND |14 15| D0 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/