We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
PLB: Difference between revisions
From SnesLab
(snes9x implementation) |
(4 cycle Instructions) |
||
| (17 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
{| class="wikitable" style="float:right;clear:right;width:40%" | |||
{| class="wikitable" style="float:right;clear:right;width: | |||
!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
|+ | |+ | ||
| Line 9: | Line 7: | ||
|'''Speed''' | |'''Speed''' | ||
|+ | |+ | ||
| | |[[Stack Addressing|Stack]] (Pull) | ||
|AB | |AB | ||
|1 byte | |1 byte | ||
| Line 16: | Line 14: | ||
{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="9"|Flags | !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 36: | Line 34: | ||
|. | |. | ||
|} | |} | ||
'''PLB''' (PulL data Bank) is a [[65c816]] instruction that pulls the byte at the top of the [[stack]] into the [[data bank register]]. PLB is the only instruction that modifies that register. The [[stack pointer]] is incremented before the byte it points to is pulled into the register. | |||
=== See Also === | |||
* [[PLD]] | |||
* [[PLX]] | |||
* [[PLY]] | |||
* [[PHB]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] page on PLB: https://archive.org/details/0893037893ProgrammingThe65816/page/n510 | * [[Eyes & Lichty]] page 484, on PLB: https://archive.org/details/0893037893ProgrammingThe65816/page/n510 | ||
* [[Labiak]] page on PLB: https://archive.org/details/Programming_the_65816/page/n178 | * [[Labiak]] page 168 on PLB: https://archive.org/details/Programming_the_65816/page/n178 | ||
* snes9x implementation of PLB: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp# | * snes9x implementation of PLB: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2032 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:65c816 additions]] | [[Category:65c816 additions]] | ||
[[Category:Pull Instructions]] | |||
[[Category:One-byte Instructions]] | |||
[[Category:Four-cycle Instructions]] | |||
Latest revision as of 12:34, 14 December 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack (Pull) | AB | 1 byte | 4 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | |||
PLB (PulL data Bank) is a 65c816 instruction that pulls the byte at the top of the stack into the data bank register. PLB is the only instruction that modifies that register. The stack pointer is incremented before the byte it points to is pulled into the register.
See Also
External Links
- Eyes & Lichty page 484, on PLB: https://archive.org/details/0893037893ProgrammingThe65816/page/n510
- Labiak page 168 on PLB: https://archive.org/details/Programming_the_65816/page/n178
- snes9x implementation of PLB: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2032