File:Acorn 65C102 co-processor schematic (Simon Inns redraw).pdf
Summary
[edit | edit source]Simon Inns's redrawn schematic of the Acorn internal 65C102 co-processor for the BBC Master (the Master Turbo board), drawn in KiCad, revision 1.0, dated 2 April 2019. Five A4 sheets: main sheet (internal Tube connectors PL1 and PL2, resistor pack RP1, Tube ULA IC1 with R1 12 ohm 1 W, 65SC102 IC8 with 16 MHz crystal X1), RAM (eight HM4864P DRAMs IC14 to IC21, 74LS257 multiplexers IC4 and IC7, 74LS590 refresh counter IC10), ROM (2732 boot ROM IC11), supply (100 nF decoupling, one per IC) and logic. This is a community redraw, not an Acorn drawing.
Source
[edit | edit source]https://archive.org/details/acorn-65-c-102-second-processor (file "Acorn 65C102 Second Processor.pdf"), retrieved 2026-10-02. The title block gives https://www.domesday86.com as the origin.
Author
[edit | edit source]Simon Inns (domesday86.com), 2019.
Licence
[edit | edit source]Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0), https://creativecommons.org/licenses/by-sa/4.0/, as stated in the title block of every sheet. Credit: (c) 2019 Simon Inns.
File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 04:28, 2 October 2026 | 0 × 0 (221 KB) | Josh (talk | contribs) | Upload Simon Inns's CC BY-SA redraw of the Master internal 65C102 co-processor |
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