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Program Status Word: Difference between revisions
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* [https://archive.org/details/SNESDevManual/book1/page/n184 page 3-8-6 of Book I] of the official Super Nintendo development manual | * subparagraph 8.1.6, [https://archive.org/details/SNESDevManual/book1/page/n184 page 3-8-6 of Book I] of the official Super Nintendo development manual | ||
[[Category:ASM]] | [[Category:ASM]] |
Latest revision as of 14:13, 29 December 2023
The Program Status Word is an 8-bit register on the SPC700 that stores the values of status flags. They are typically listed in this order: NVPBHIZC. More verbosely:
Flag Name | Bit Position |
---|---|
Negative Flag | bit 7 |
Overflow Flag | bit 6 |
Direct Page Flag | bit 5 |
Break Flag | bit 4 |
Half-carry flag | bit 3 |
Interrupt Enable Flag | bit 2 |
Zero Flag | bit 1 |
Carry Flag | bit 0 |
Both the PUSH and POP commands can operate on the PSW.
See Also
Reference
- subparagraph 8.1.6, page 3-8-6 of Book I of the official Super Nintendo development manual