MC6850 ACIA

MOTOROLA MC6850 ASYNCHRONOUS COMMUNICATIONS INTERFACE ADAPTER (ACIA)

v0.8

The MC6850 Asynchronous Communications Interface Adapter provides the data formatting and control to interface serial asynchronous data communications information to bus organized systems such as the MC6800 Microprocessing Unit.

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Blaster sprites

Blaster Sprites, Advanced

Update on emulator issue, Oct 31st, 2018

Atari legend Nicolas Pomarède points out that it doesn’t really make sense to combine the NFSR and FXSR bits the way I do. And he’s right!

My mistake was relying on emulators while writing this, and using the NFSR and FXSR bits this way was the only way I could make it work. So…

Wanted!

Someone to figure out what is going wrong here. Please email me your findings at per@brainfish.net - thanks in advance!


v 1.04, Oct 23rd, 2018 - There was bug in X clipping when showing fewer than the 16 rightmost pixels. It displayed fine in STEem, which is why I missed it.

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