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RIO firmware notes: exact EPROM part (AM27C512-150) + replacement pick

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Cyd
2026-07-04 20:22:14 -05:00
co-authored by Claude Fable 5
parent 673cebf3b8
commit d0b53e93dd
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emulator/rio-firmware/README.md
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# RIO board firmware # RIO board firmware
- **`RIOv4_2.bin`** — RIO cockpit I/O board firmware **v4.2**, dumped - **`RIOv4_2.bin`** — RIO cockpit I/O board firmware **v4.2**, dumped
2026-07-04 from one of our own boards' EPROM (64KB / 27C512-class image). 2026-07-04 from one of our own boards' EPROM: an **AMD AM27C512-150**
(64K x 8 UV EPROM, 150ns — the image fills it exactly).
sha256 `60a88718835c654b6135dbec7721c40ef99dca07df2ad4b57eedeb24037a5f73`. sha256 `60a88718835c654b6135dbec7721c40ef99dca07df2ad4b57eedeb24037a5f73`.
For the eventual patched burn: a pin-compatible Winbond W27C512
(electrically erasable, TL866-friendly) drops straight into the socket;
the original AMD chip gets labeled and preserved unmodified.
## First-look analysis (from the image alone, confirmed on hardware) ## First-look analysis (from the image alone, confirmed on hardware)