The CoCoPSG is an extremely versatile adapter for the Color Computer family of computers including:

• 512K bank-selectable Flash ROM
• 512K bank selectable RAM
• A Yamaha YM2419 Software-Controlled Sound Generator (SSG) (programming compatible with the GI AY-3-8910 PSG)
• Software-select 1MHz or 2MHz clock for widest range of SSG note frequencies
• 2 x 9-pin digital joystick ports compatible with many Atari and Sega style controllers

Zippster's CoCoPSG Project Blog

CoCo ChipTunes player by Todd “Lord Dragon” Wallace
Treasure Island Defence by Sheldon MacDonald
Ice Brawlers by Sheldon MacDonald
PSG Boot Loader by Sheldon MacDonald

CoCoPSG User Manual with programming info

General Instruments AY-3-8910 Programming Manual (1979)

Play a 12 note scale starting at middle C on a CoCoPSG in Multi-Pak slot 1 using 6809 assembly: testssg.asm

CoCoPSG sound and joystick controller test code in one file using 6809 assembly: testssg2.asm

If you would like to discuss tips, tricks, coding, and more for the CoCoPSG, join us on the CoCo Discord in the SOUND / #cocopsg channel.

Return to Tandy Color Computer