Re: Commodore 8296GD

From: Michał Pleban <*lists_at_michau.name*> Date: Sat, 13 Oct 2012 12:54:52 +0200 Message-ID: <5079487C.8010507@michau.name> · lists_at_michau.name

Hello!

Today I checked the video memory orientation. It is really very simple.
The bitmap starts at $A000 in expansion ram, and continues to $DFFF.

The bitmap is organized linearly, so the first 64 bytes form the first
line, then the second line etc. This is different from, for example, C64
bitmap where the bitmap is formed into 8-byte "characters". Here the
data bytes are just placed line by line.

I have yet to figure out the correct way to switch on the display mode -
apparently the CRTC initialization sequence I found earlier is not
enough. I will keep looking in the ROM.

Regards,
Michau.

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