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CALL (SPC700): Difference between revisions
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!colspan="8"|Flags Affected | !colspan="8"|Flags Affected | ||
|+ | |+ | ||
|N | |[[Negative Flag|N]] | ||
|V | |[[Overflow Flag|V]] | ||
|P | |[[Direct Page Flag|P]] | ||
|B | |[[Break Flag|B]] | ||
|H | |[[Half-Carry Flag|H]] | ||
|I | |[[Interrupt Enable Flag|I]] | ||
|Z | |[[Zero Flag|Z]] | ||
|C | |[[Carry Flag|C]] | ||
|+ | |+ | ||
|. | |. | ||
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'''CALL''' is an [[SPC700]] instruction that calls a subroutine. The current [[program counter]] is pushed to the stack (high byte first, then low byte). Then the address following the opcode becomes the new value of the program counter.<sup>[2]</sup> | '''CALL''' is an [[SPC700]] instruction that calls a subroutine. The current [[program counter]] is pushed to the stack (high byte first, then low byte). Then the address following the opcode becomes the new value of the program counter.<sup>[2]</sup> | ||
No flags are affected. | |||
==== Syntax ==== | |||
<pre> | |||
CALL !abs | |||
</pre> | |||
=== See Also === | === See Also === | ||
* [[TCALL]] | * [[TCALL]] | ||
* [[PCALL]] | * [[PCALL]] | ||
* [[RET]] | |||
* [[JSR]] | * [[JSR]] | ||
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[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Subroutine Call Return Commands]] | [[Category:Subroutine Call Return Commands]] | ||
[[Category:Three-byte Instructions]] | |||
Latest revision as of 17:36, 8 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Absolute | 3F | 3 bytes | 8 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
CALL is an SPC700 instruction that calls a subroutine. The current program counter is pushed to the stack (high byte first, then low byte). Then the address following the opcode becomes the new value of the program counter.[2]
No flags are affected.
Syntax
CALL !abs
See Also
External Links
- Official Nintendo documentation on CALL: Table C-16 in Appendix C-9 of Book I
- anomie's spc700 doc