zxsp is a simulator for the historic Sinclair ZX home computer families. Main supported platform is Mac OS X. Versions for classic MacOS and old versions of Mac OS X are available from the Old versions/ directory.
zxsp supports ".sna" and ".z80" snapshot files, ".tap", ".tzx", ".80", ".81", ".o", ".p" tape files, excellent sound, precise screen and border effects, joysticks, a virtual tape recorder and virtual keyboards.
zxsp can load from and save to a built-in virtual tape recorder or a real-world cassette recorder or a real-world Specci. It also can dup real-world cassette tapes to ".tap" files or vice versa.
Ruthesford's Revenge - 128k.gif zxsp supports the black&white models ZX80 and ZX81, the ZX Spectrum models with 16K and 48K ram, the +128, +2 and the +2A/+2B. If you still own one of the emulated machines and find that the simulation does not match the original, you are welcome to contact me for further improvement. Just keep the original thing ready for tests.