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Processor Status Register: Difference between revisions

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(Memory/Accumulator Select)
(X Flag)
Line 4: Line 4:
* [[Overflow Flag]] - V
* [[Overflow Flag]] - V
* [[Memory/Accumulator Select]] - M
* [[Memory/Accumulator Select]] - M
* x
* [[Index Register Select]] - X
* [[Decimal Mode]] - D
* [[Decimal Mode]] - D
* [[Interrupt Disable Flag]] - I
* [[Interrupt Disable Flag]] - I

Revision as of 22:57, 17 July 2024

The Processor Status Register (P) is on the 65c816 and contains several flags:

It can be pulled from the stack via PLP and RTI.

There are nine instructions that directly modify these flags, including:[3]

The only transfer instructions that do not modify these flags are TCS and TXS.

See Also

Reference

  1. Table 18.2 Eyes & Lichty, page 422: https://archive.org/details/0893037893ProgrammingThe65816/page/422
  2. Figure 17.3, Lbid, page 377: https://archive.org/details/0893037893ProgrammingThe65816/page/n403
  3. page 262, https://archive.org/details/0893037893ProgrammingThe65816/page/n288