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PCALL (SPC700): Difference between revisions
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'''PCALL''' (uPage CALl) is an [[SPC700]] instruction that runs a subroutine in the [[ | '''PCALL''' (uPage CALl) is an [[SPC700]] instruction that runs a subroutine in the [[uppermost page]]. The operand specifies the low byte of the target address within the uppermost page. | ||
No flags are affected. | No flags are affected. | ||
Revision as of 21:34, 2 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Uppermost Page | 4F | 2 bytes | 6 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
PCALL (uPage CALl) is an SPC700 instruction that runs a subroutine in the uppermost page. The operand specifies the low byte of the target address within the uppermost page.
No flags are affected.
Syntax
PCALL upage
PCALL $xx has the same effect as CALL $FFxx.[2]
See Also
External Links
- Official Nintendo documentation on PCALL: Table C-16 Appendix C-9 of Book I
- https://forums.nesdev.org/viewtopic.php?t=13313
- https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L534