ZX Spectrum Hardware Description
22:52
The Madness of Z80 I/O
24:17
I built a ZX Spectrum Using All New Parts
40:45
ZX Spectrum, Expansion Port Research
11:38
Clever engineering on a budget - ZX Spectrum Interrupts
15:05
Zilog Z80 Deep Dive - How does it work?
24:01
48K ZX Spectrum Repair (No. 5)
18:33
ZX Spectrum build, No ULA.
17:18