ZX Spectrum 16K/48K
Manufacturer | Sinclair Research |
Mfg. volume | appx. 4M units |
CPU | Z80A @ 3.5MHz |
ROM | 16kB |
RAM | 16kB or 48kB |
as pages | flat |
Gfx Res | 256×192 |
Gfx Colours | 15 (2 per 8×8 cell) |
Case Design
blah blah Rick Dickinson
ULA
blah blah Richard Altwasser
blah blah Ferranti
blah blah The ZX Spectrum ULA by Chris Smith.
blah blah Flash bug, dead cockroach, spider, dot crawl, ULA snow, spurious memory contention. YUV output. Speck of dust. 5C and 6C series.
NTSC Spectrum
Sold in Chile. Didn't meet FCC standards, so was not sold in the USA — the Timex TS2068 was produced instead.
Two machines found, one with 5C114E ULA, one with 6C011E-3.
Software
blah blah Nine Tiles Ltd
blah blah John Grant, Steve Vickers.
Rubber Keyboard Model
blah blah ZX Interface 1 & Microdrives
Plastic Keyboard Model
blah blah toastrack & QL
Motherboards
blah blah board issues
blah blah reuse of faulty memory chips
Issue 1
blah blah ZX Spectrum 48k ram upgrade
Issue 2
blah blah blue keys
blah blah 48K on-board
Issue 3
blah blah new speaker
blah blah low power ULA, EAR socket changes causing compatibility problems, 'spider' fix integrated into board.
blah blah Spectrum+.
Issue 6
blah blah changes if using Saga ULA.
External links
- ZX Spectrum 16K/48K versions at Planet Sinclair