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Emualtor RX side

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Aiden
2026-05-25 21:25:10 +10:00
parent 752148c585
commit e141f3b30d
9 changed files with 597 additions and 2 deletions
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README.md
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@@ -42,6 +42,7 @@ To start the current emulator harness:
.\.venv\Scripts\python.exe h8536_emulator.py --max-steps 1000000 --stop-on-heartbeat --interval-steps 512
.\.venv\Scripts\python.exe h8536_emulator_probe.py --max-steps 4000000 --stop-on-tx
.\.venv\Scripts\python.exe h8536_emulator_probe.py --max-steps 1000000 --stop-on-tx --p9-fast-path
.\.venv\Scripts\python.exe h8536_emulator_rx_probe.py --preset connect-lcd
```
## What It Does
@@ -81,8 +82,9 @@ To start the current emulator harness:
- Handles the E-clock transfer instructions `MOVFPE` and `MOVTPE`.
- Recognizes likely LCD E-clock access routines at `H'F200`/`H'F201`, including busy-flag polling and data/control writes.
- Generates a separate C-like pseudocode view from the JSON, preserving labels, calls, branches, register names, inferred symbols, metadata comments, optional cycle notes, and simple structured `if`/`do while` patterns.
- Provides an early H8/536 emulator harness with ROM/RAM/register memory mapping, reset-vector boot, SCI1 transmit capture, MOV condition-code updates, `SCB/F`, stack/call/return support, scaffolded SCI1 TXI/interval/FRT1-OCIA/FRT2-OCIA interrupt scheduling, a P9 bit-banged bus model, and an opt-in P9 transfer fast path.
- Provides an early H8/536 emulator harness with ROM/RAM/register memory mapping, reset-vector boot, SCI1 transmit capture, MOV condition-code updates, `SCB/F`, stack/call/return support, indirect `JMP/JSR @Rn` dispatch, scaffolded SCI1 RXI/ERI/TXI and interval/FRT1-OCIA/FRT2-OCIA interrupt scheduling, a P9 bit-banged bus model, and an opt-in P9 transfer fast path.
- Includes an emulator probe that reports hot PCs, recent P9/SCI accesses, serial report queue/gate traces, RAM lifecycle watches, final SCI1/TXI state, and captured P9 byte candidates while running the real ROM.
- Includes an RX command probe that boots until SCI1 RXI is serviceable, injects host six-byte frames through RDR/RDRF, listens for device TX frames, and reports serial latch/table/LCD-buffer effects.
Current serial observations:
@@ -92,6 +94,7 @@ Current serial observations:
- Idle cadence from the reference file: 54 frames, average about 699.9 ms, min 601 ms, max 803 ms.
- Static/runtime finding: `F9C4` is a candidate idle heartbeat/report countdown. Init loads `H'14`, `loc_BA26` reloads `H'07` after a send, FRT2 OCIA decrements it, and `loc_4046` can enqueue report `H'0000` when it reaches zero and the queue is empty.
- Runtime-confirmed heartbeat path: `loc_4067` writes `H'0000` into the queue via a zero-extended word move, `loc_BAF2/loc_BB08` dequeue it, `loc_BB1C/loc_BB20/loc_BB2B` stage the TX bytes, and `loc_BA26` emits `00 00 00 00 80 DA`.
- RX probe finding: the `--preset connect-lcd` sequence reaches the command-`0x04` handler; `04 00 00 80 00 DE` writes table index zero, fills the LCD line buffer with `CONNECT: OK`, and emits `02 00 02 00 00 5A` in the current emulator model.
- Observed capture labels such as `cam_power_button_candidate` and `call_button_candidate` are deliberately treated as capture overlays, not protocol facts hard-coded in ROM.
The generated listing is written to:
@@ -190,6 +193,7 @@ For the emulator harness:
```powershell
python h8536_emulator.py --help
python h8536_emulator_probe.py --help
python h8536_emulator_rx_probe.py --help
```
- `--rom PATH`: use an explicit ROM path instead of auto-discovering `ROM\M27C512@DIP28_1.BIN`.
@@ -201,6 +205,8 @@ python h8536_emulator_probe.py --help
- `--p9-fast-path`: shortcut known P9 transfer routines for exploration.
- `--trace-report-gates`, `--trace-report-queue`, and `--trace-ram-lifecycle`: inspect the serial report queue, `loc_4046`/`F9C4` gate, and watched RAM byte history.
- `--target-frame "00 00 00 00 80 DA"`: compare staged/emitted TX bytes against an expected six-byte frame.
- `h8536_emulator_rx_probe.py "04 00 00 80 00"`: append the checksum, inject the host frame through SCI1 RX, and summarize responses.
- `h8536_emulator_rx_probe.py --preset connect-lcd`: replay the current CONNECT LCD activation candidates.
- Current status: boots from `H'1000`, initializes SCI1, models the first P9 bit-banged handshakes, captures P9 byte candidates, can optionally fast-path known P9 routines, and schedules FRT1/FRT2 OCIA. With the P9 fast path and current timer cadence, the emulator reaches the SCI1 transmit path and emits the observed heartbeat frame `00 00 00 00 80 DA`.
## Code Layout
@@ -233,6 +239,7 @@ python h8536_emulator_probe.py --help
- `h8536/table_xrefs.py`: table/index xrefs and LCD correlation report generation.
- `h8536/consistency.py`: decompiler/pseudocode semantic consistency checks.
- `h8536/emulator/`: early H8/536 emulator package split into CPU state, memory map, SCI1 TX capture, P9 bus model, runner, probe, CLI, and peripheral scaffolding.
- `h8536/emulator/rx_probe.py`: host-frame injection and response/listener probe for SCI1 RX experiments.
- `h8536/board_profile.py`: Sony RCP-TX7 board-trace annotations, including the MAX202 RS232 path.
- `h8536/peripheral_access.py`: FRT/A-D TEMP-register access analysis.
- `h8536/pseudocode.py`: JSON-to-C-like pseudocode generation.
@@ -242,4 +249,4 @@ python h8536_emulator_probe.py --help
- `h8536_serial_pseudocode.py`: focused serial pseudocode CLI wrapper.
- `h8536_protocol_trace.py`, `h8536_protocol_capture.py`: protocol analysis CLI wrappers.
- `h8536_serial_gate.py`, `h8536_report_source_trace.py`, `h8536_table_xrefs.py`, `h8536_consistency.py`: sidecar analysis CLI wrappers.
- `h8536_emulator.py`, `h8536_emulator_probe.py`: emulator CLI wrappers.
- `h8536_emulator.py`, `h8536_emulator_probe.py`, `h8536_emulator_rx_probe.py`: emulator CLI wrappers.