Atari 2600 / F228
BEING VERIFIEDROL MUST SNAPSHOT OLD CARRY BEFORE WRITING NEW CARRY
- STATUS
- BEING VERIFIED
- AREA
- Recompiler
- RECORDED
- 2026-07-15
- PUBLIC SOURCE
- Research dossier / finding 228
- RECORD ID
atari2600-f228- SNAPSHOT
d8dcf6d8dd492341
HYPOTHESIS: ROL copies old carry into result bit 0, copies old operand bit 7 to new carry, masks to one byte, and derives N/Z from the result. Those two carry roles cannot share a mutable carrier without preserving their order.
Raw traces, ROM material, local paths, and personal data are not part of this public record.
01INPUT IDhash receipt
02BYTE MAPdecode coverage
03CPU STATEtrace comparison
04BUS / TIMEordered effects
05OUTPUTvisual · audio · input
06ARTIFACTbuild identity