Technical Reference

The Color Computer Reference Manual contains schematics and detailed hardware information.

See the CoCo Hardware Reference on this site.

ROM Disassembly

Spectral Associates (the people who made Madness and the Minotaur) produced a series of disassemblies of the CoCo ROMs! Here are those awesome PDFs:

Color Basic Unravelled

Extended Basic Unravelled

Disk Basic Unravelled

Super Extended Basic Unravelled

Disassembled Code