#Sinclair zx spectrum computer for sale mac os#

The ZX81 extremely modest hardware doesn’t pose any problems from an emulation perspective.

#Sinclair zx spectrum computer for sale mac os#

There’s support for Linux, Raspberry Pi, FreeBSD, Mac OS X, and Windows.

ZEsarUX (shown in the image to the left) is our favourite open source emulator for the ZX81. Recommended Open Source Emulators Click image for full size There were also several replacement ROMs available as well as clones with a slightly modified ROM.

There are multiple versions of the ZX81 ROM including two official ROMs: the original ROM and an improved ROM which fixed a bug in calculating the square root of 0.25. The ZX81’s ROM also offered a syntax checker that indicated errors in BASIC code as soon as it was entered. The ZX81’s ROM was 8K in size and incorporated trigonometric and floating point functions which were missing in its predecessor, the ZX80. The rights to the ROM are owned by Nine Tiles Information Handling Ltd, who were contracted by Sinclair to write the ROM code for the ZX81 (as well as the ZX80 and ZX Spectrum). It was one of the earliest home computers manufactured in the UK. It ran a Z80 processor clocked at 3.25 MHz with a mere 1KB of RAM (although many users purchased a 16KB external RAM pack). It was launched in 1981 and sold for £49.95 in kit form and £69.95 for an assembled computer. The ZX81 was a hugely successful Z80-based home computer produced by Sinclair Research and manufactured in Scotland.