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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 [[Uppermost Page]].  The operand specifies the low byte of the target address within the uppermost page.
'''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

  1. Official Nintendo documentation on PCALL: Table C-16 Appendix C-9 of Book I
  2. https://forums.nesdev.org/viewtopic.php?t=13313
  3. https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L534