CALL (SPC700): Difference between revisions

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

External Links

Official Nintendo documentation on CALL: Table C-16 in Appendix C-9 of Book I
anomie's spc700 doc

@@ Line 1: / Line 1: @@
-'''CALL''' is an [[SPC700]] instruction that performs a subroutine call.
+{| class="wikitable" style="float:right;clear:right;width:40%"
-{| class="wikitable" style="float:right;clear:right;width:30%"
 !colspan="8"|Basic Info
 |+
@@ Line 9: / Line 7: @@
 |'''Speed'''
 |+
-|implied
+|[[Absolute Addressing | Absolute]]
 |3F
 |3 bytes
@@ Line 16: / Line 14: @@
 {| class="wikitable" style="float:right;clear:right;width:30%"
-!colspan="8"|Flags Clobbered
+!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]]
 |+
 |.
@@ Line 36: / Line 34: @@
 |.
 |}
+'''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 ===
 * [[TCALL]]
 * [[PCALL]]
+* [[RET]]
+* [[JSR]]
+=== External Links ===
+# Official Nintendo documentation on CALL: Table C-16 in [https://archive.org/details/SNESDevManual/book1/page/n234 Appendix C-9 of Book I]
+# [https://www.romhacking.net/documents/197 anomie's spc700 doc]
 [[Category:ASM]]
 [[Category:SPC700]]
+[[Category:Subroutine Call Return Commands]]
+[[Category:Three-byte Instructions]]