ZX81 repair
27:01
Sinclair QL - RAM Repair and Minerva ROM (Part 1)
13:30
Sinclair ZX81 Repair - White Screen and No Cursor
19:10
ZX81 still awesome after 40 years!
19:22
16K ZX81 vs 16K ZX Spectrum
22:53
Sinclair ZX81 Spruce Up (Composite, 16K, Keyboard & More!)
27:04
ZX81 ZXvid Upgrade
17:06
ZX81 Goes Nuclear - Controlling a Nuclear Power Plant
18:58