OpArt for the ZX81 with Chroma

Discussion about ZX80 / ZX81 Software
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GCHarder
Posts: 253
Joined: Sat Dec 14, 2013 7:46 pm

OpArt for the ZX81 with Chroma

Post by GCHarder »

Designed for Chroma but works without. Tested in emulation only.

Regards;

Greg
Screen shots
Screen shots
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OpArt.zip
Program and docs
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Fruitcake
Posts: 172
Joined: Wed Sep 01, 2010 10:53 pm

Re: OpArt for the ZX81 with Chroma

Post by Fruitcake »

Nice! I've added a link to the program from my website.

One issue that caught me out for a while is that the program only runs when using the edition 2 ZX81 ROM. With an edition 1 ROM the program crashes with error code C/9510.

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GCHarder
Posts: 253
Joined: Sat Dec 14, 2013 7:46 pm

Re: OpArt for the ZX81 with Chroma

Post by GCHarder »

It has to do with differences in the "expression evaluator" between the two ROMs, at 0F55 in edition 2. Any app using the evaluator, such as Hot Z, will crash. Try this on both ROMs PRINT +1.

Unfortunately, there's no easy work around for this.

Regards;

Greg

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