Machine Code Spirograph program

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Bukster
Posts: 93
Joined: Wed Sep 12, 2018 9:44 am

Machine Code Spirograph program

Post by Bukster »

Here's a quick machine code project. How about a spirograph program? The options screen is in Basic. Select your parameters for the spirograph you want to see or press R for a random series of screen savers. If you select parameter input, the program will draw your spirograph and then redraw it after a pause. Press any key to exit when it's pausing.

It draws in blue if you have a Chroma interface but will work with just a 16k ram pack in monochrome
Spirograph1.jpg
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Spirograph2.jpg
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Spirograph 080121.p
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XavSnap
Posts: 1940
Joined: Sat May 10, 2008 4:23 pm
Location: 'Zx81 France' Fb group.

Re: Machine Code Spirograph program

Post by XavSnap »

Thanks Bukster.

Ever seen this such of program on the ZxPrinter in Basic, not on the screen !

The "PLOT" basic ROM command jump is not use... great job.
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
Bukster
Posts: 93
Joined: Wed Sep 12, 2018 9:44 am

Re: Machine Code Spirograph program

Post by Bukster »

The "PLOT" basic ROM command jump is not use... great job.
Yes, I used my own quick plot routine that I wrote some years ago. I used the same routine in the version of the Arcade game 'Berzerk" named Berzxerk as it was for a ZX81.
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