Date   : Mon, 22 Nov 2010 23:44:19 +1100
From   : plexer@... (James McGill)
Subject: Extracting / Encoding sprites

Does anyone know of a clever way of extracting sprites from a ROM? So
far I've modified a 6502 disassembler to perform static analysis and
mark code vs data segments, but I can't find a way to make any sense
of the data segments. I'm treating each byte as a Mode 2 pixel. and
have tried arranging them in blocks of 16 x 8 pixels traversing x-wise
first, and y-wise first. I'm not sure what makes sense as an encoding
for a sprite in ROM given the BBC's interesting screen address
layouts.

The ROM is http://www.bbcmicrogames.com/software/acornsoft/monsters.zip.
I know the little monsters are hiding in there somewhere.

Regards,
James