This demo works on a ZX81 16k RAM, and also has sound if you have ZON-X sound card. It was made by Mad Axe with music by Yerzmyey. Download here:
Huge playlist archive with ZX81 demos:
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3 months ago 00:18:33 4
ZX Spectrum build, No ULA.
9 months ago 00:13:31 2
ZX Spectrum DRAM timing explained.
1 year ago 00:06:48 1
3D STAR RAID (2023) Walkthrough, ZX81 16K + Zon-X + Chroma
1 year ago 01:22:23 1
Abandoned ZX81 Pt6 Upgrades!
1 year ago 00:50:20 1
Sinclair ZX-81 (Timex 1000) Старший брат ZX-Spectrum или большая история маленького компьютера.