File:Sinclair ZX Spectrum 128 circuit diagram (sheet 3).png
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Summary
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Despite the file name, this is not the Spectrum 128. It is one of three overlapping sections (this is section 3), some of them rotated, cut from a scan of Sinclair's circuit diagram for the 48K ZX Spectrum Issue 2 board: the same drawing as File:ZX Spectrum Schematic.png, from a poorer scan. The drawing shows the ULA (IC1), Z80 (IC2), ROM (IC5), the 4116 RAM bank, the LM1889 colour encoder and the dashed "optional 32K RAM" block.
Source
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Source not recorded.
Author
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Sinclair Research Ltd
Licence
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Copyright Sinclair Research Ltd. Not freely licensed. Hosted for preservation and repair reference.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:06, 8 August 2026 | | 2,133 × 3,000 (1.06 MB) | Josh (talk | contribs) | Upload ZX Spectrum+/+2 image |
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