mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-28 10:59:16 -04:00
Matthew Stanley
43 lines
1.5 KiB
Python
43 lines
1.5 KiB
Python
"""Read the state-machine state byte on DuckStation vs runtime."""
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import socket, json
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def call(port, cmd, **kw):
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s = socket.create_connection(('127.0.0.1', port), timeout=5)
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s.sendall((json.dumps({'id':1,'cmd':cmd, **kw})+'\n').encode())
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buf = b''
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while not buf.endswith(b'\n'):
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c = s.recv(65536)
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if not c: break
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buf += c
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s.close()
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return json.loads(buf.decode())
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def read_word(port, addr):
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r = call(port, 'read_ram', addr=f'0x{addr:08X}', len=4)
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if not r.get('ok'): return None
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b = bytes.fromhex(r['hex'])
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return int.from_bytes(b, 'little')
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for label, port in [('runtime', 4470), ('duckstation', 4371)]:
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print(f"=== {label} (port {port}) ===")
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try:
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p = call(port, 'ping')
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print(f" ping fr={p.get('frame','?')}")
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except Exception as e:
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print(f" ping failed: {e}")
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continue
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# Read scratchpad ptr at 0x1F8001D4
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ptr = read_word(port, 0x1F8001D4)
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print(f" scratchpad[0x1D4] (state struct ptr) = 0x{ptr:08X}")
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# State byte at ptr+0x4E (halfword)
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state_word = read_word(port, ptr + 0x4C) # word containing 0x4E,0x4F bytes
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state = (state_word >> 16) & 0xFFFF
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print(f" state @ ptr+0x4E = 0x{state:04X} ({'normal' if state < 6 else '>=6, handler SKIPS'})")
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# 0x8009B3D4 high half
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field_word = read_word(port, 0x8009B3D4)
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print(f" mem[0x8009B3D4] = 0x{field_word:08X} high_half=0x{(field_word>>16)&0xFFFF:04X} ({'state-0 main path' if (field_word & 0xFFFF0000)==0 else 'state-0 side path (skips!)'})")
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print()
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