File:Ferranti Archives ZX81-UNK-SCH-136 Pencil sketch of the ZX81 keyboard matrix, back view.pdf
Summary
[edit | edit source]A pencil and red-pencil drawing on squared paper titled "ZX81 KEYBOARD (BACK VIEW)". It shows the 40-key matrix as eight half-rows of five keys, with a diode on each of the eight row lines and five column lines labelled "KB"; the end keys of each row (1 and 0, Q and P, A and NEW LINE, SHIFT and SPACE) are named. The Maplin article ZX81-UNK-LIT-134 gives the same wiring in schematic form, with the eight lines as address lines A8 to A15 and the five as KBD0 to KBD4. The catalogue describes it as a keyboard layout; it is a wiring diagram of the matrix. Part of the Ferranti Archives 2026.
Archive record
[edit | edit source]| Catalogue ID | ZX81-???-SCH-136 |
|---|---|
| Date | Undated |
| Origin | UNKNOWN |
| Document type | Schematic/Diagrams |
| Device or subject | ZX81 Keyboard |
| Catalogue description | A pencil sketch of the ZX81 keyboard layout |
| Original file name | {{{filename|}}}
|
| Found in | ZX81-FER-FOL-142 |
| Pages | 1 |
Source
[edit | edit source]Ferranti Archives 2026, original scan on Google Drive.
Author
[edit | edit source]Unknown
Licence
[edit | edit source]Ferranti Archives 2026: source and terms of use
This scan is part of the Ferranti Archives 2026, a collection of Sinclair-related documents from Ferranti's files, catalogued in 2026 and released through the Happy Little Diodes YouTube channel (video, catalogue). The archive presents the documents for preserving and archiving material of historical interest, and for non-commercial, educational and archival research. Its terms state that consent is strictly limited to non-commercial use, and that any commercial exploitation of the documents or their contents, including use in connection with the manufacture, marketing or sale of goods, is strictly prohibited by Sky UK Limited.
Copyright remains with the rights holders. The file is not freely licensed and is hosted here for preservation and repair reference only, under the archive's terms. Personal information was redacted by the archive before release; if you find any that remains, please tell [email protected].
File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 11:00, 18 October 2026 | 0 × 0 (814 KB) | Josh (talk | contribs) | Ferranti Archives 2026: ZX81-UNK-SCH-136 |
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