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Program Status Word: Difference between revisions
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The '''Program Status Word''' is an 8-bit register on the [[SPC700]] that stores the value of status flags. They are typically listed in this order: NVPBHIZC. More verbosely: | The '''Program Status Word''' is an 8-bit register on the [[SPC700]] that stores the value of status flags. They are typically listed in this order: NVPBHIZC. More verbosely: | ||
* Negative Flag | * Negative Flag - bit 7 | ||
* overflow Flag | * overflow Flag - bit 6 | ||
* [[direct page flag]] | * [[direct page flag]] - bit 5 | ||
* [[Break Flag]] | * [[Break Flag]] - bit 4 | ||
* [[Half-carry flag]] | * [[Half-carry flag]] - bit 3 | ||
* [[Interrupt Enable Flag]] | * [[Interrupt Enable Flag]] - bit 2 | ||
* Zero Flag | * Zero Flag - bit 1 | ||
* Carry flag | * Carry flag - bit 0 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Flags]] | [[Category:Flags]] | ||
Revision as of 22:08, 14 July 2023
The Program Status Word is an 8-bit register on the SPC700 that stores the value of status flags. They are typically listed in this order: NVPBHIZC. More verbosely:
- 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