Chloe 280SE
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Infobox: Chloe 280SE
| Manufacturer | Specification only |
| Mfg. volume | None |
| CPU | Z804C0020 @ 3.5MHz / 21MHz |
| ROM | 32kB |
| RAM | 256kB |
| as pages | 64kB + 64kB + 128kB |
| Gfx Res | 256×192 or 512×192 (hi-res) |
| Gfx Colours | 256 (2 per 8×8 or 8×1 cell), or 2 (hi-res) |
The Chloe 280SE was originally a reference specification for a production version of the ZX Spectrum SE. It had the following differences:
- T-states are exactly as per the 48K Spectrum.
- 256K total RAM (no page 8 in the HOME bank, and no 8K serial RAM on the PSG)
- 224K of uncontended RAM (64K in each sideways bank, 96K in the HOME bank)
- 32K of contended VRAM (page 5 and 7 in the HOME bank)
- No RAM contention when paging sideways RAM over the HOME bank.
- 32K Flash ROM (no TR-DOS traps, SE Basic IV is the default firmware).
- ULAplus support in all video modes.
- Z84C0020PEG CPU (software switchable between 3.5Mhz and 21Mhz).
- YM219F PSG (software switchable stereo panning).
It subsequently became an FPGA project not directly related to the ZX Spectrum.