Atari 2600 / F257
BEING VERIFIEDABSOLUTE-INDEXED READS MAKE PAGE CROSSING AN EXECUTED BUS CHOICE
- STATUS
- BEING VERIFIED
- AREA
- Timing / bus
- RECORDED
- 2026-07-16
- PUBLIC SOURCE
- Research dossier / finding 257
- RECORD ID
atari2600-f257- SNAPSHOT
f114355884d03a2c
MOS manual section 6.1, Example 6.6 gives the no-cross sequence: opcode, BAL, BAH, then effective data in four cycles. Example 6.7 shows that a page cross first reads the old-page/new-low address and ignores its data while adding the carry to BAH, then reads effective data in cycle five.
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