PHP: Difference between revisions

Latest revision as of 14:20, 8 August 2024


Basic Info
Addressing Mode	Opcode	Length	Speed
Stack (Push)	08	1 byte	3 cycles


Flags Affected
N	V	M	X	D	I	Z	C
.	.	.	.?	.	.	.	.

PHP is a 65x instruction that pushes the value of the processor status register onto the stack. The e bit is omitted from this operation. PHP always pushes a single byte.

The stack pointer will then point directly below the byte pushed.

No flags are affected according to Eyes & Lichty. But fullsnes claims that PHP always writes a one into the break flag.

Syntax

PHP

External Links

Eyes & Lichty, page 480 on PHP
Labiak, page 164 on PHP
8.11 on MCS6500 Manual, page 122 on PHP
Carr, page 267 on PHP
Leventhal, page 3-82 on PHP
snes9x implementation of PHP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1844
Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.8.3

@@ Line 1: / Line 1: @@
-'''PHP''' is a 65x instruction that pushes the value of the [[processor status register]] onto the stack.
+{| class="wikitable" style="float:right;clear:right;width:40%"
+!colspan="8"|Basic Info
+|+
+|'''Addressing Mode'''
+|'''Opcode'''
+|'''Length'''
+|'''Speed'''
+|+
+|[[Stack Addressing|Stack]] (Push)
+|08
+|1 byte
+|3 cycles
+|}
 {| class="wikitable" style="float:right;clear:right;width:30%"
-!colspan="9"|Flags Clobbered
+!colspan="9"|Flags Affected
 |+
-|N
+|[[Negative Flag|N]]
-|V
+|[[Overflow Flag|V]]
-|M
+|[[M Flag|M]]
-|X
+|[[X Flag|X]]
-|D
+|[[Decimal Flag|D]]
-|I
+|[[I Flag|I]]
-|Z
+|[[Zero Flag|Z]]
-|C
+|[[Carry Flag|C]]
 |+
 |.
 |.
 |.
-|.
+|.?
 |.
 |.
@@ Line 22: / Line 34: @@
 |.
 |}
+'''PHP''' is a 65x instruction that pushes the value of the [[processor status register]] onto the [[stack]].  The [[e bit]] is omitted from this operation.  PHP always pushes a single byte.
+The [[stack pointer]] will then point directly below the byte pushed.
+No flags are affected according to Eyes & Lichty.
+But [[fullsnes]] claims that PHP always writes a one into the [[break flag]].
+==== Syntax ====
+<pre>
+PHP
+</pre>
+=== See Also ===
+* [[PLP]]
+* [[PHA]]
+* [[PHX]]
+* [[PHY]]
+* [[PHB]]
+* [[PHK]]
+=== External Links ===
+* [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/480 page 480] on PHP
+* [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n174 page 164] on PHP
+* 8.11 on [[MCS6500 Manual]], [https://archive.org/details/mos_microcomputers_programming_manual/page/n141 page 122] on PHP
+* [[Carr]], [https://archive.org/details/6502UsersManual/page/n280 page 267] on PHP
+* [[Leventhal]], [https://archive.org/details/6502-assembly-language-programming/page/n131 page 3-82] on PHP
+* snes9x implementation of PHP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1844
+* Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.8.3
 [[Category:ASM]]
+[[Category:Inherited from 6502]]
+[[Category:Push Instructions]]
+[[Category:One-byte Instructions]]