ZX Spectrum build video circuit.
13:31
ZX Spectrum DRAM timing explained.
19:22
16K ZX81 vs 16K ZX Spectrum
19:54
VIC 20 build. Raster generator HSYNC and VSYNC
26:20
Bad RAM - ZX Spectrum repair
12:33
Spectrum 48K Bluetooth, load games from your phone!
17:01
VIC 20 build. Monochrome video output.
22:52
The Madness of Z80 I/O
14:18