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Direct Page Flag: Difference between revisions
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The '''Direct Page Flag''' (P) | The '''Direct Page Flag''' (P) is bit 5 of the [[S-SMP]]'s [[program status word]]: | ||
When clear, the [[direct page]] is the zeropage (located at 0000h to 00FFh). | * When clear, the [[direct page]] is the zeropage (located at 0000h to 00FFh). | ||
* When set, the direct page is page one (located at 0100h to 01FFh). | |||
The direct page flag is set by [[SETP]] and cleared by [[CLRP]]. | |||
[[File:spc700 dp.png|thumb]] | |||
=== Reference === | === Reference === | ||
Latest revision as of 21:53, 14 August 2024
The Direct Page Flag (P) is bit 5 of the S-SMP's program status word:
- When clear, the direct page is the zeropage (located at 0000h to 00FFh).
- When set, the direct page is page one (located at 0100h to 01FFh).
The direct page flag is set by SETP and cleared by CLRP.
Reference
- Appendix C-2 of Book I of the official Super Nintendo development manual