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File:Ferranti Archives IF1-SIN-SCH-006 detail, pencil ZTX313 sketch on the IORQGE line.png

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Summary

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The left-hand edge of the A3 copy of the ZX Interface 1 circuit diagram of 4 July 1983 with its pencil additions: a transistor labelled "ZTX313" with a +5V connection, a line from its base to the IORQ line of the Spectrum connector, and a line from its emitter round the margin to the IORQGE line beside transistor Q10. Above it are the IC3 inputs A11, A13 and M1. Native resolution of the scan. Used on Sinclair ZX Interface 1.

Detail rendered from File:Ferranti Archives IF1-SIN-SCH-006 ZX Interface 1 circuit diagram, A3 copy with pencil notes, 4 July 1983.pdf.

Licence

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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/TimeThumbnailDimensionsUserComment
current11:43, 18 October 2026Thumbnail for version as of 11:43, 18 October 20261,500 × 1,900 (1.14 MB)Josh (talk | contribs)Upload for Sinclair ZX Microdrive / ZX Interface 1 pages

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