aiden/h8-536-decoder
1
0
Fork 0
Code Activity

copy branch

Browse Source
This commit is contained in:
Aiden
2026-05-26 15:54:12 +10:00
parent 87fb14c71a
commit c0e3aaddee
13 changed files with 485648 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@@ -150,7 +150,7 @@ Current serial observations:
- Bench serial-format finding: real hardware talks `38400 8E1`. Earlier `8N1` captures primarily exercised SCI1 parity/error handling and retry echoes, not the normal command path. After switching bench scripts to even parity, the selector-zero CONNECT path can reach `CONNECT: OK`.
- Bench CONNECT recovery finding: `CONNECT:NOT ACT` is recoverable without a power cycle. This makes it a normal no-active-session/cleared-state display rather than a terminal latch; tests can now probe from the idle NOT ACT state directly, then separately check whether OK is held or needs periodic CCU-like refresh traffic.
- Bench CONNECT cadence finding: the `40 -> 80 -> C0` sequence stayed at `CONNECT:NOT ACT` with 10 ms, 50 ms, and 150 ms gaps, but produced `CONNECT: OK` then returned to `CONNECT:NOT ACT` with 700 ms and 1.5 s gaps. At 700 ms, single `40`/`80`/`C0` frames did not work, but all tested two-frame pairs did. Repeated `80 -> 80` at about 700 ms also worked, so the values do not need to differ. The no-power-cycle NOT ACT recovery capture produced repeated `02 00 02 00 00 5A` OK-path responses before heartbeat traffic resumed.
- Bench special-selector finding: in the CONNECT OK advance sweep, command-5 selector `0x006C` (`05 00 6C 00 00 33`) produced `CONNECT OK` then a blank LCD with the CAM POWER lamp still on, while selector `0x006D` (`05 00 6D 00 00 32`) produced `CONNECT OK` then `COPY IN PROGRESS` then `CONNECT NOT ACT`. A later fresh isolated `ack-006d` run in `captures/connect-ok-advance-special-20260526-153339.txt` reproduced the copy path after a relay power-cycle. Forced ROM decoding confirms `0x006C -> H'2FAF` and `0x006D -> H'3015`; the `0x006D` path sets display selector `F732=H'1903`, a long `F798` countdown, and the ROM contains the `COPY IN PROGRESS` LCD string. The RCP-TX7 manual identifies `COPY IN PROGRESS` as the multi-camera `COPY TO SLAVES` transfer state over the RS232C command-link system, with controls locked until `COPY COMPLETED`.
- Bench special-selector finding: in the CONNECT OK advance sweep, command-5 selector `0x006C` (`05 00 6C 00 00 33`) produced `CONNECT OK` then a blank LCD with the CAM POWER lamp still on, while selector `0x006D` (`05 00 6D 00 00 32`) produced `CONNECT OK` then `COPY IN PROGRESS` then `CONNECT NOT ACT`. A later fresh isolated `ack-006d` run in `captures/connect-ok-advance-special-20260526-153339.txt` reproduced the copy path after a relay power-cycle. Forced ROM decoding confirms `0x006C -> H'2FAF` and `0x006D -> H'3015`; the `0x006D` path sets display selector `F732=H'1903`, a long `F798` countdown, and the ROM contains the `COPY IN PROGRESS` LCD string. LCD dispatch now traces through `493E[0x19] -> H'930A`, with local table entry `H'9F6A` building `COPY IN PROGRESS` and entry `H'9FDA` building `COPY COMPLETED`; `0x006C` appears to be the completion/exit sibling only after `0x006D` has set the `F795.6/F795.7` copy flags. The RCP-TX7 manual identifies `COPY IN PROGRESS` as the multi-camera `COPY TO SLAVES` transfer state over the RS232C command-link system, with controls locked until `COPY COMPLETED`.
- ROM report-source finding: the active `02/01 ...` frames exposed during CONNECT OK attempts are autonomous `F870 -> BAF2 -> BA26` report-queue transmissions, not ordinary command-1 readbacks. The ROM sets `FAA2.3/FAA3.7` after sending them, so the CCU probably needs to answer in that continuation window with command `4`, `5`, or `6` to consume the report queue and keep the session alive.
- Board/P9 finding: traced MCU pin 62 `P91` reaches X24164 pin 6 `SCL`, and MCU pin 68 `P97` reaches the shared X24164 pin 5 `SDA` node. The emulator now treats the ROM's `C121/C08B/C0DB/C10C/C142` P9 routines as an X24164-style two-wire EEPROM bus, with ROM logical addresses `0x000-0x7FF` on the `H'A0/H'A1` control-byte family and `0x800-0xFFF` on `H'E0/H'E1`.
- EEPROM role finding: `loc_40BB` checks `P7DR.7` and the `F402 == H'6B6F` signature before defaulting EEPROM/shadow tables; `loc_4103` writes ROM default words through `BFE0`, `loc_41D2` reads sixteen 8-byte records into `F7B0-F82F`, and the command-4 path at `BD2B-BD5F` can persist serial table writes when `F76E.7` is set.