mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 18:25:35 -04:00
Matthew Stanley
8b0fc34714
Real card protocol restarts on every fresh 0x81 — SELECT deassert is
a bus-wide reset signal. Earlier model preserved mc_state across
deassert via mc_save_slot, which caused every subsequent 0x81 to land
on a stale non-IDLE saved state and trigger abort_reselect bookkeeping.
Audit confirmed the BIOS-visible RX was still correct (the abort path
itself reset mc_state), but the retained sector/cmd/counter context
across logically-independent transactions was wrong per no$psx.
Clear volatile protocol state on SELECT deassert (state, cmd, sector,
sector_msb, sector_lsb, data_idx, checksum on both slots). Preserve
mc_slots[].flag (persistent "new card" metadata) and mc_slots[].data
(sector buffer, harmless to retain).
Result on a 4-press boot run: 6 transactions reach READ_DATA (ts=10)
and successfully read the "MC" header magic (RX bytes 0x4D 0x43);
remaining txns continue as 4-byte presence pings. Pre-fix: 0 reads
of card data ever; post-fix: card protocol can complete the setup
phase and enter data phase.
The byte-15 abort that follows is a separate blocker — kernel chain
dispatcher interleaves pad polling into the card data read. Tracked
for next session via the chain dispatcher disassembly.
Also includes:
- Slot-state capture in SioTraceEntry + sio_trace JSON emission
- dirty_ram_interp: replace mid-block fprintf+fflush with a counter
(CLAUDE.md §3 — synchronous Windows console I/O at high rate
starves the dispatch loop)
- Passive Python TCP probes (raw_tcp, trace_audit, trace_range,
txn_summary, txn_dist, txn_bytes, drs_filter, readram_test,
step_audit{,2}, verify_card_buffer, wtrace_filter)
- docs/MEMCARD_AUDIT_2026_04_28.md (prior session's 7-layer audit)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
62 lines
2.3 KiB
Python
62 lines
2.3 KiB
Python
#!/usr/bin/env python3
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"""Deeper SIO trace mining for card-related entries."""
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import socket, json, sys
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def send(cmd, **kw):
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req = {"id": 1, "cmd": cmd, **kw}
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s = socket.socket(); s.settimeout(15.0); s.connect(("127.0.0.1", 4370))
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s.sendall((json.dumps(req) + "\n").encode())
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buf = b""
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depth_c = depth_s = 0
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in_str = esc = started = False
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while True:
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chunk = s.recv(65536)
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if not chunk: break
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for b in chunk:
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buf += bytes([b]); ch = chr(b)
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if in_str:
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if esc: esc = False
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elif ch == "\\": esc = True
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elif ch == '"': in_str = False
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continue
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if ch == '"': in_str = True
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elif ch == "{": depth_c += 1; started = True
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elif ch == "}": depth_c -= 1
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elif ch == "[": depth_s += 1
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elif ch == "]": depth_s -= 1
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if started and depth_c == 0 and depth_s == 0:
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s.close(); return json.loads(buf.decode().strip())
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s.close()
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return json.loads(buf.decode().strip())
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count = int(sys.argv[1]) if len(sys.argv) > 1 else 8000
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r = send("sio_trace", count=count)
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ents = r.get("entries", [])
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print(f"sio_trace total_seq={r.get('total')} returned={len(ents)}")
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# Card related: mc_pre or mc_post > 0 OR dev_pre/dev_post == DEV_MEMCARD (=2)
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DEV_MEMCARD = 2
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DEV_PAD = 1
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cards = [e for e in ents if e.get("mc_pre", 0) > 0 or e.get("mc_post", 0) > 0
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or e.get("dev_pre") == DEV_MEMCARD or e.get("dev_post") == DEV_MEMCARD]
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print(f"card-related: {len(cards)}")
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# Of card-related, how many had irq_cd > 0 (IRQ countdown armed)?
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armed = [e for e in cards if e.get("irq_cd", 0) > 0]
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print(f"card-related with irq_cd>0 at trace time: {len(armed)}")
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# Show first few card-related
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if cards:
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print("\nfirst 5 card-related:")
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for e in cards[:5]:
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print(f" seq={e['seq']} tx={e['tx']} rx={e['rx']} mc_pre={e['mc_pre']} mc_post={e['mc_post']}"
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f" dev_pre={e['dev_pre']} dev_post={e['dev_post']} ctrl={e['ctrl']} irq_cd={e['irq_cd']}"
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f" abort={e['abort']} in_exc={e['in_exc']}")
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# distribution of irq_cd values for card bytes
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if cards:
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from collections import Counter
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cdist = Counter(e['irq_cd'] for e in cards)
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print(f"\nirq_cd distribution among card bytes: {dict(cdist)}")
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