Introduction

M64 was written in 1997 to allow the Commodore 64 to function as a standalone synth module, producing sound in realtime driven by signals from a midi interface. M64 features a built in editor for programmable sounds and a virtual machine to execute the code that produce sound.

Manual

An extensive manual is available in the following formats.

Web manual
GEOWrite manual
PETASCII 80 column text format
PETASCII 40 column text format
Plain Unix/Amiga text format

The manual explains how to get the files to your Commodore 64 via Midi if necessary.

A small change in the flowchart has been made from the original manual since Autoboy/Hack'n Trade pointed out it was wrong. localAlways is executed before globalAlways. This is reflected in all manuals except in the GEOWrite manual.

Download

D64 format
Zip file with ordinary PRG format files
Zip file with Midi Sysex format files
Zip file with DAsm source files. Note that these are old assembler source files that doesn't reflect good programming practices.