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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: | ||
{| class="wikitable" | |||
!colspan="2"| | |||
|+ | |||
! 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 | |||
|} | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Flags]] | [[Category:Flags]] | ||
Revision as of 22:53, 15 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:
| 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 |