ZigZags by Noice, colorized

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GCHarder
Posts: 427
Joined: Sat Dec 14, 2013 7:46 pm

ZigZags by Noice, colorized

Post by GCHarder »

ZigZags by Noice, nice programs originally designed for 1K ZX81.

The original programs are

Noice-1.p (AKA Severely Limited v1)
Noice-2.p (AKA Severely Limited v2)

ZigZags is my full screen version.

Can anyone explain to me how these programs, Noice-1 and 2, even LOAD and RUN. There is absolutely no starting code that I can see.
There is no BASIC lines. Loading and stopping the program will crash the system. I LOADed the code to low RAM to disassemble and analyze.

Note, Noice-1.asm is my analysis of the program.

Enjoy;

Greg

Here's another interesting version.

Press a key, except "Q" which quits the program, will cycle through the Ireg values resulting in some interesting dislays.
Attachments
ZigZags-I.zip
"I"reg version
(3.39 KiB) Downloaded 312 times
"I"reg version screenies
"I"reg version screenies
ZigZag screenies
ZigZag screenies
Noice screenies
Noice screenies
ZigZags.zip
Program files
(6.45 KiB) Downloaded 329 times
Last edited by GCHarder on Sat Jun 20, 2020 7:01 pm, edited 1 time in total.
olofsen
Posts: 189
Joined: Wed Jan 08, 2014 12:29 pm

Re: ZigZags by Noice, colorized

Post by olofsen »

It seems NXTLIN points to a line at 403C where there is a USR 16458 (8F 00 94 00 00). The ZigZags look very good with colours! :)
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GCHarder
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Re: ZigZags by Noice, colorized

Post by GCHarder »

Thanks, that's a neat trick, I'll have to remember it.

Regards;

Greg
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