Pixel Plotting in ZX80 Basic

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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TheSnial
Posts: 1
Joined: Sun Apr 14, 2019 10:42 pm

Pixel Plotting in ZX80 Basic

Post by TheSnial » Mon Apr 15, 2019 10:23 am

For fun I wanted to reproduce the Jupiter Ace sine wave program on a ZX80 in BASIC. ZX80 Basic of course doesn't provide PLOT or UNPLOT, the display is inconveniently after the workspace and variables (so you can't just cache the start address) and the block graphics character codes are in a wacky order, but eventually I managed it :-)

Image

Image

A longer blog about this epic struggle can be found here.

.z80 files attached.
Attachments
ZX80Plottastic.zip
(2.97 KiB) Not downloaded yet

Lardo Boffin
Posts: 915
Joined: Sat Nov 26, 2016 2:42 am

Re: Pixel Plotting in ZX80 Basic

Post by Lardo Boffin » Thu Apr 25, 2019 10:55 pm

Interesting program and blog! Clearly a lot of patience was required.
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Various Spectrum 48ks plus a DIVMMC future and SPECTRA

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