E-Tracker Player

Disassembly of ESI's E-Tracker compiled module player (1992) for the SAM Coupé. Initial disassembly created with dZ80.

I created this disassembly to track down a bug that is incorrectly retriggering notes when an instrument is provided without a note. The player in the editor does not retrigger, the compiled player does. See for example Sam n Bass.

While investigating, DTA pointed out another bug in the noise generator selection. Vexx Ingame suffers from this, compare:

• compiler
• E-Tracker

Ant targets

• verify - assembles the e-tracker player using pyz80 and compares the assembled binary with a reference binary
• execute - assembles a wrapper including the e-tracker player, a compiled module and a simple play loop, and then opens the resulting dsk image in SimCoupe