NTSC Colour and Movement on an AT90S2313

This is a hack I put together. It is generated by an AT90S2313 (aka ATtiny2313) and a 74HC166 shift register. Below are links to the source code and schematic.

http://kaput.homeunix.org/~thrashbarg/NTSC_colour.png
http://kaput.homeunix.org/~thrashbarg/NTSC_colour.zip

The dot moving across the screen is controlled by a very precisely set Timer1, which gets its clock source from the load strobe connected to the shift register. The movement is much more fluid on a real television.

Category:

Science & Technology

Tags:

• attiny
• at90s2313
• hack
• video
• ntsc
• color

[kiyotewolf]

Those are the Apple ][e GR colors! Neat!

~Kiyote!

[256byteram]

@kiyotewolf They sure are, I used the same technique. It was used on the IBM CGA adapter too. DOSbox can emulate it.

[kiyotewolf]

@256byteram

I am working on making "Apple Clone" games, which use CGA ~ DOSBOX to re-create the exact colors (not same resolution, but close) so I can make my old games over again today.

[svofski]

good job!

[EmilElectrics]

Nice work!