PCALL (SPC700): Difference between revisions

Latest revision as of 21:55, 10 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]

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

@@ Line 9: / Line 9: @@
 |[[Uppermost Page Addressing | Uppermost Page]]
 |4F
-|2 byte
+|2 bytes
 |6 cycles
 |}
@@ Line 35: / Line 35: @@
 |}
-'''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.
+==== Syntax ====
+<pre>
+PCALL upage
+</pre>
+PCALL $xx has the same effect as [[CALL]] $FFxx.<sup>[2]</sup>
 === See Also ===
-* [[CALL]]
 * [[TCALL]]
+* [[RET]]
+* [[JSR]]
 === External Links ===
-* Official Nintendo documentation on PCALL: Table C-16 [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I]
+# Official Nintendo documentation on PCALL: Table C-16 [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I]
+# https://forums.nesdev.org/viewtopic.php?t=13313
+# https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L534
 [[Category:ASM]]
 [[Category:SPC700]]
-[[Category:Subroutine Call, Return Commands]]
+[[Category:Subroutine Call Return Commands]]
 [[Category:Two-byte Instructions]]