Search found 2 matches

by tedious
Thu Dec 24, 2009 7:41 am
Forum: Developer's Heaven
Topic: BT I: GFX format
Replies: 7
Views: 10086

BT I: GFX format

Some graphics in the intro sequence are encoded in the following runlength encoding (example: $5200, $5d00, $6800, $6d00, $9000, $9700, $9d00, $a300, $a800, $ae00):

First byte: tag for "Set position" instruction (default row 0, col 0)
Second byte: tag for run length instruction
Then comes image ...
by tedious
Wed Dec 23, 2009 1:49 pm
Forum: Developer's Heaven
Topic: BT 1 file list on CBM64
Replies: 68
Views: 151796

It's font allright. It is located at $15D0 and onward in memory. I believe there is one normal and one inverted version in memory. I honestly don't think they have been visionary enough to visually invert the font by changing the colors.

The bitmapped font starts at $15CE (referenced by $0A26 and ...