Kandowontu

Earthworm Jim - Fastrom (Patreon)

Published:

2023-03-21 17:18:21

Imported:

2026-06

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Content

So this game was programmed for fastrom, it even has code to set $420D to 1...yet fastrom is not enabled in this game. Why?

Well, stepping through a debugger, it appears that the Data Bank register was set to 7E instead of 00, so it was trying to write #1 to $7E420D instead of $00420D which is where the register is located.

A simple hook and small additional code was enough to fix it.

Enjoy!