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The TS1500 was a slightly-upgraded development of the Timex Sinclair TS1000. It replaced the earlier machine's ZX80-like case with a modified ZX Spectrum case and increased the onboard RAM to 16K, but was still unsuccessful.
| Sinclair computers, derivatives, and clones |
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By Sinclair Research and Amstrad: ZX80 |
ZX81 |
ZX Spectrum, Spectrum+, Spectrum 128, +2 and +3 (the latter two by Amstrad) |
Sinclair QL |