CLRP (SPC700): Difference between revisions

Latest revision as of 21:54, 14 August 2024


Basic Info
Addressing Mode	Opcode	Length	Speed
Implied (type 2)	20	1 byte	2 cycles


Flags Affected
N	V	P	B	H	I	Z	C
.	.	0	.	.	.	.	.

CLRP (Clear Page) is an SPC700 instruction that clears the direct page flag, making the direct page coincident with the zero page.

No other flags are affected.

CLRP

@@ Line 1: / Line 1: @@
-'''CLRP''' is an [[SPC700]] instruction that clears the [[direct page flag]].
+{| 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
+|[[Implied]] (type 2)
 |20
 |1 byte
@@ 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: @@
 |.
 |}
+'''CLRP''' (Clear Page) is an [[SPC700]] instruction that clears the [[direct page flag]], making the [[direct page]] coincident with the [[zero page]].
+No other flags are affected.
+==== Syntax ====
+<pre>
+CLRP
+</pre>
+[[File:spc700 dp.png]]
 === See Also ===
 * [[SETP]]
+* [[CLRV]]
+* [[CLRC]]
+=== External Links ===
+* Official Super Nintendo development manual on CLRP: Table C-19 in [https://archive.org/details/SNESDevManual/book1/page/n235 Appendix C-10 of Book I]
+* anomie: https://github.com/yupferris/TasmShiz/blob/8fabc9764c33a7ae2520a76d80ed7220bb939f12/spc700.txt#L385
 [[Category:ASM]]
 [[Category:SPC700]]
 [[Category:Program Status Flag Operation Commands]]
+[[Category:One-byte Instructions]]