Oldschool 128B -- Purple Beat
This was a last minute update, when I discovered existing code to
do 6502 bytebeat music on Atari 2600.
The music code is by Tjoppen (used by permission)
which is based off of viznut's
combination of xpansive's and
varjohukka's work fro a pout thread which came up with the bytebeat pattern
(t>>7|t|t>>6)*10+4*(t&t>>13|t>>6)
.
The original example was for PAL and didn't try at all to have valid
timing signals. I reworked it with different visualization and have it
generating a more or less correct NTSC signal. The visualization
is relatively boring, with the background color being based on part
of the count and the sprite pattern just being the current scanline.
Finish: 4/17 128 Byte Oldschool Intro
Video: 
