File:Acorn Risc PC Technical Reference Manual drawings.pdf

The engineering drawings from Appendix C of Acorn's Risc PC Technical Reference Manual (part no. 0497,057, issue 1, September 1994), which are missing from the scan hosted as File:Acorn Risc PC Technical Reference Manual.pdf. 22 sheets, A1 and A2, combined into one PDF in this order: Embedded on Acorn Risc PC Technical Reference Manual.

1. Pages 1–7: "Medusa" main PCB circuit diagram, drawing 0197,000/C, sheets 1 to 7 (sheet 1: CPU slots, IOMD, ROMs, I²C, battery-backed RAM/RTC and reset).
2. Pages 8–9: main PCB assembly drawing, sheets 1 and 2.
3. Pages 10–11: ARM610 processor card circuit diagram and assembly drawing.
4. Pages 12–14: VRAM card circuit diagram, 1 MB and 2 MB assembly drawings.
5. Pages 15–16: 2-way backplane circuit diagram and assembly drawing.
6. Pages 17–18: 4-way backplane circuit diagram and assembly drawing.
7. Pages 19–22: final assembly drawings 0097,630/A (sheets 1 and 2) and 0097,625/A (sheets 1 and 2).

The drawings are for the original Risc PC 600 main board, 0197,000. They do not cover the later 1208,000 board used in the Risc PC 700.

Chris's Acorns, archived by The Centre for Computing History: https://chrisacorns.computinghistory.org.uk/docs/Acorn/Manuals/Acorn_RiscPCTRM_Drawings.zip (linked as "Technical Drawings" from https://chrisacorns.computinghistory.org.uk/Computers/RiscPCComputers.html), retrieved 2026-10-01. The 22 separate PDFs in the archive were joined into one file without other changes.

Acorn Computers Ltd.

Copyright 1994 Acorn Computers Ltd. Hosted for preservation and repair reference.