4 ms·
The unexpanded ZX81 had 1kB of RAM, of which 672 bytes were usable (and you had to fit your video framebuffer and program storage in there; no ROM cartridges he
by david-given 11y ago
The unexpanded ZX81 had 1kB of RAM, of which 672 bytes were usable (and you had to fit your video framebuffer and program storage in there; no ROM cartridges here!).
Here's an emulator: http://www.zx81stuff.org.uk/zx81/jtyone.html http://www.zx81stuff.org.uk/zx81/jtyone.html