Mastodawn

For Such a Small Program, ZX81 1K Chess Sure Packs a Lot In

https://fed.brid.gy/r/https://hackaday.com/2026/04/03/for-such-a-small-program-zx81-1k-chess-sure-packs-a-lot-in/

For Such A Small Program, ZX81 1K Chess Sure Packs A Lot In

The Sinclair ZX81 was hardly the most accomplished of 1980s 8-bit microcomputers, but its ultra-low-budget hardware was certainly pressed into service for some impressive work. Perhaps the most leg…

Hackaday

Marquis de Geek 1d ago

Renewed interest in my adventures with 1K ZX Chess for the #Sinclair #ZX81

Includes:
* emulation
* rebuilds
* CYD
* full source explanations
* fun! (+)

https://hackaday.com/2026/04/03/for-such-a-small-program-zx81-1k-chess-sure-packs-a-lot-in/#comment-8282701

+ fun not guaranteed

For Such A Small Program, ZX81 1K Chess Sure Packs A Lot In

The Sinclair ZX81 was hardly the most accomplished of 1980s 8-bit microcomputers, but its ultra-low-budget hardware was certainly pressed into service for some impressive work. Perhaps the most leg…

Hackaday

13 1d ago

For Such a Small Program, ZX81 1K Chess Sure Packs a Lot In https://hackaday.com/2026/04/03/for-such-a-small-program-zx81-1k-chess-sure-packs-a-lot-in/
#Retrocomputing #1kchess #CheapYellowDisplay #Chess #Sinclairzx81 #Zx81

For Such A Small Program, ZX81 1K Chess Sure Packs A Lot In

The Sinclair ZX81 was hardly the most accomplished of 1980s 8-bit microcomputers, but its ultra-low-budget hardware was certainly pressed into service for some impressive work. Perhaps the most leg…

Hackaday

Juan F. Ramírez 1d ago

If you'd like to own a #zx81 inspired mechanical keyboard, maybe this kickstarter is for you:

https://www.kickstarter.com/projects/1225158274/kilozed-zx81-inspired-keycaps-for-modern-mechanical-keyboar

#zxspectrum #retrogaming

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C64Whiz 1d ago

Whew...gave me a little hassle as the plastic binding is only as big as Timex wanted. Had to fight a bit with the last few pages and back cover, but it's all back together. Time to put it away with it's machine again.

#RetroComputing #TimexSinclair1000 #ZX81

C64Whiz 2d ago

Time to re-assemble!

#RetroComputing #TimexSinclair1000 #ZX81

MacReeg 5d ago

https://www.golem.de/news/podcast-besser-wissen-der-1k-computer-2603-206934.html

#gamedevelopment #gamedev #gamedesign #gameconsole #retrogames #retrogaming #vintagecomputer #vintagecomputing #commodore64 #commodoregames #handheld #videogames #collectable #retrocomputer #oldtech #palmtop #classiccomputer #retrotech #retrotechnology #nostalgia
#sinclair #zxspectrum #zx81

Podcast Besser Wissen: Der 1K-Computer - Golem.de

Wir haben das ZX-Team getroffen und sprechen im Podcast über Geschichte und Zukunft des kleinen Sinclair.

Golem.de

Marquis de Geek 6d ago

Also on the ZX Chess front, I did a complete breakdown of the game by creating a Z80 disassembly, understanding it, commenting it, and then creating a rebuildable version. (I also found a way to save 3 bytes!)

I won't spoil all the tricks here, but imagine my smile when I realised why the look-up movement table for the king was being purposefully ordered so it could be re-used for the queen, rooks, bishops, and (er) black pawns!

https://github.com/MarquisdeGeek/1kzxchess

#sinclair #chess #zx81 #programming