mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-27 10:38:46 -04:00
Matthew Stanley
60801820fd
Replace absolute F:/C: paths with repo-relative (../TombaRecomp, bios/, beetle-psx/) or placeholders (<desktop>/<psxref>/<nesrecomp>/<psxrecomp-v4>) across accuracy docs, WIDESCREEN/SHADOW/RECURSION_BUG/config_schema/ISSUES/README, and tools/*.py|.ps1. Removed a personal C:\Users\Matthew\Desktop path (ISSUES.md). Left CLAUDE.md/PLAN.md sibling-project + version-history paths intact (intentional layout documentation).
70 lines
2.7 KiB
Python
70 lines
2.7 KiB
Python
#!/usr/bin/env python3
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import sys
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rom = open('../bios/SCPH1001.BIN','rb').read()
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matches = []
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for rt in range(32):
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word = (0x0F << 26) | (rt << 16) | 0xF200
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b = word.to_bytes(4, 'little')
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off = 0
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while True:
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o = rom.find(b, off)
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if o == -1: break
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bios_addr = 0xBFC00000 + o
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next_word = int.from_bytes(rom[o+4:o+8], 'little')
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op = (next_word >> 26) & 0x3F
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rs = (next_word >> 21) & 0x1F
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rt_out = (next_word >> 16) & 0x1F
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imm = next_word & 0xFFFF
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matches.append((bios_addr, rt, op, rs, rt_out, imm, next_word, o))
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off = o + 4
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print("--- ROM sites forming 0xF200xxxx (class values) ---")
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for addr, rt, op, rs, rt_out, imm, nw, offset in matches:
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if rs == rt and rt_out == rt:
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if op == 0x0D:
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marker = "OPENEVENT-TARGET" if imm in (1,2,3,9) else ""
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print(f" 0x{addr:08X}: lui r{rt}, 0xF200; ori r{rt}, 0x{imm:04X} class=0xF200{imm:04X} {marker}")
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print("\n--- 0xF2000003 (VBlank) sites, JAL-adjacency check ---")
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for addr, rt, op, rs, rt_out, imm, nw, offset in matches:
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if rs == rt and rt_out == rt and op == 0x0D and imm == 0x0003:
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o = offset
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# JAL preceding? (i.e. at offset-4)
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if o >= 4:
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prev = int.from_bytes(rom[o-4:o], 'little')
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op_prev = (prev >> 26) & 0x3F
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if op_prev == 0x03:
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jal_addr = 0xBFC00000 + o - 4
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target = (jal_addr & 0xF0000000) | ((prev & 0x3FFFFFF) << 2)
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print(f" 0x{addr:08X}: VBlank class; PREV_JAL at 0x{jal_addr:08X} -> 0x{target:08X}")
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else:
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print(f" 0x{addr:08X}: VBlank class; prev op=0x{op_prev:02x} at 0x{0xBFC00000+o-4:08X}")
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# Now: find which functions contain these addresses
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# A function "contains" addr if it's the closest-entry <= addr
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# Read dispatch.c:
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print("\n--- Functions containing 0xF2000003 sites ---")
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import re
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dispatch = open('../generated/SCPH1001_dispatch.c').read()
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entries = re.findall(r'\{\s*0x([0-9A-F]+)u,\s*func_([0-9A-F]+)\s*\}', dispatch)
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# Only keep those in code range (phys 0x1FC00000+)
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fn_list = sorted([(int(a,16), name) for a,name in entries])
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def containing_fn(addr):
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phys = addr & 0x1FFFFFFF
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prev = None
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for faddr, name in fn_list:
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if faddr <= phys:
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prev = (faddr, name)
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else:
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break
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return prev
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for addr, rt, op, rs, rt_out, imm, nw, offset in matches:
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if rs == rt and rt_out == rt and op == 0x0D and imm == 0x0003:
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cf = containing_fn(addr)
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if cf:
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print(f" 0x{addr:08X} (lui+ori F2000003) is inside func_{cf[1]} (entry 0x{cf[0]:08X})")
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else:
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print(f" 0x{addr:08X}: NO CONTAINING FUNCTION (orphan code region!)")
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