mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 10:19:47 -04:00
Matthew Stanley
5b3c7dd08d
Today's session work
- runtime/src/debug_server.c: freeze_check TCP cmd snapshots all liveness
counters (PC, exception entries, exception_reentry_blocks, dirty_ram
blocks/insns, fn_entry total + top-K histogram, SIO IRQ pending +
countdown, sio_stat/i_stat/i_mask, mc_max_state) for tight-loop
diagnosis when the runtime hangs
- runtime/src/debug_server.c: wtrace slot 12 covering [0x72F0..0x72F4]
(data-byte counter); measured peak=1 confirming setup_data_phase resets
the counter mid-cycle
- runtime/src/interrupts.c: exception_entries_total + exception_reentry_blocks
counters + psx_get_freeze_diag accessor
- runtime/src/sio.c: sio_get_freeze_diag accessor for IRQ pacing internals
- memory entries: phase4_card_gate_setup_writes_2026_04_28 (refutes the
prior \"missing [0x7568+slot] clearer\" framing — setup functions write
LSB=0 directly), phase4_72f0_one_byte_per_vblank_2026_04_28 (peak=1
measurement)
Overnight session work bundled in
- runtime/src/dirty_ram_interp.{c,h}: small MIPS interpreter for
install-at-runtime kernel RAM stubs (Rule 18; e.g., SIO data-byte
handler the BIOS writes to RAM 0xCF0)
- recompiler/src/full_function_emitter.{cpp,h}: 3057 jal/jalr continuation
return labels added to dispatch table (continuation fix); branch
fall-through fix for conditional-branch delay slots
- recompiler/src/strict_translator.cpp: matching translator updates
- generated/: regenerated SCPH1001 dispatch + full C output reflecting
the recompiler changes
- runtime/include/debug_server.h, src/memory.c: card_txn ring + SIO IRQ
ring + EvCB walk ring + per-PC dirty_ram counters + always-on wtrace
coverage for [0x755A], [0x7514], [0x7528], [0x7520], [0x74A4],
[0x75C0..C8], [0x74B8..C0]
- recompiler/tests/, runtime/tests/: SIO/card protocol unit tests
- tools/: 60+ Python diagnostic scripts (chain_trace analysis, SIO trace
diff, EvCB walker, wtrace dumpers, etc.)
- docs/: psx_bios_disasm reference + dynamic_handler_install rationale
- OVERNIGHT_2026_04_28.md, SUMMARY_20260412_2.md: session logs
Phase 4 status (still blocked, root cause better understood)
- BIOS card chain runs through R-handlers correctly (chain_trace shows
R1..R11 cycling 26x); shell IS retriggering _card_read
- Install handler at ROM 0xBFC15F1C increments [0x72F0] correctly per
SIO IRQ; gate at <0x80 / <0x7F is correct
- Bottleneck: SIO IRQ countdown is access-paced, fires ~1× per VBlank
vs ~128× needed; setup_data_phase (called from outer coord on VBlank)
zeroes [0x72F0] before counter reaches 128
- Both attempted fixes today caused freezes:
* VBlank deferral on [0x75C0]==1 — pending VBlank already in i_stat
delivered anyway; tighter dispatch gate also locked up
* Cycle-paced sio_tick at rates 50, 200 (and gated on [0x75C0]==1) —
runtime freezes once data phase activates, root cause unidentified
- delay=5 narrows the threshold (peak=2 vs peak=1, no freeze) but
doesn't get to 0x80
- Real fix likely requires deeper instrumentation of the freeze (call
stack / dispatch state at the moment of TCP starvation)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
#!/usr/bin/env python3
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"""Check which psx_dispatch targets are in the dispatch table."""
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import re, sys
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# Read dispatch table entries
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dispatch_addrs = set()
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with open('generated/SCPH1001_dispatch.c') as f:
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for line in f:
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m = re.search(r'\{ (0x[0-9A-Fa-f]+)u, func_', line)
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if m:
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dispatch_addrs.add(int(m.group(1), 16))
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def normalize(addr):
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phys = addr & 0x1FFFFFFF
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if 0x1FC10000 <= phys <= 0x1FC17FFF:
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phys = phys - 0x1FC10000 + 0x500
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if 0x30000 <= phys <= 0x5AFFF:
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phys = phys - 0x30000 + 0x1FC18000
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return phys
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# Shell entry dispatch calls
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addrs = [
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0x8005A8D0, 0x8005A8E0, 0x80030798, 0x800403F0,
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0x8004EF90, 0x8003FDB0, 0x8003FE88, 0x8003F910,
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0x80040490, 0x80030788, 0x80059C80, 0x8004ED1C,
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0x80035BF4, 0x80030788, 0x80035DD8, 0x80035F50,
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0x80030788, 0x800359C4, 0x80056FF0, 0x800359C4,
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0x8003FB24, 0x80030684, 0x800360C4, 0x80030788,
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0x8003D558, 0x8003DE8C, 0x80059E30, 0x80059F10,
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0x8004B6F0, 0x80030254,
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]
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for i, a in enumerate(addrs):
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n = normalize(a)
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in_table = n in dispatch_addrs
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status = "OK" if in_table else "MISS"
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print(f"{i+1:2d}. 0x{a:08X} -> 0x{n:08X} {status}")
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