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PER: Difference between revisions
From SnesLab
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|'''Speed''' | |'''Speed''' | ||
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|[[Stack Addressing|Stack]] | |[[Stack Addressing|Stack]] (PC Relative Long) | ||
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!colspan="9"|Flags Affected | !colspan="9"|Flags Affected | ||
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|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]] | ||
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'''PER''' (Push pc RElative indirect Address) is a [[65c816]] instruction that pushes a 16-bit | '''PER''' (Push pc RElative indirect Address) is a [[65c816]] instruction that pushes a 16-bit sum to the [[stack]]. The addends are the [[program counter]] after it has been incremented to point to the instruction following PER, and the 16-bit displacement following the PER opcode. The high byte of the sum is pushed before the low byte. | ||
=== See Also === | === See Also === | ||
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=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] page 475, on PER: https://archive.org/details/0893037893ProgrammingThe65816/page/n501 | * [[Eyes & Lichty]] page 475, on PER: https://archive.org/details/0893037893ProgrammingThe65816/page/n501 | ||
* [[Labiak]] page on PER: https://archive.org/details/Programming_the_65816/page/n169 | * [[Labiak]] page 159 on PER: https://archive.org/details/Programming_the_65816/page/n169 | ||
* snes9x implementation of PER: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1685 | * snes9x implementation of PER: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1685 | ||
* undisbeliever on PER: https://undisbeliever.net/snesdev/65816-opcodes.html#per-push-effective-pc-relative-indirect-address | * undisbeliever on PER: https://undisbeliever.net/snesdev/65816-opcodes.html#per-push-effective-pc-relative-indirect-address | ||
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[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:65c816 additions]] | [[Category:65c816 additions]] | ||
[[Category:Three-byte Instructions]] | |||
[[Category:Six-cycle Instructions]] | |||
Latest revision as of 12:29, 14 December 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack (PC Relative Long) | 62 | 3 bytes | 6 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
PER (Push pc RElative indirect Address) is a 65c816 instruction that pushes a 16-bit sum to the stack. The addends are the program counter after it has been incremented to point to the instruction following PER, and the 16-bit displacement following the PER opcode. The high byte of the sum is pushed before the low byte.
See Also
External Links
- Eyes & Lichty page 475, on PER: https://archive.org/details/0893037893ProgrammingThe65816/page/n501
- Labiak page 159 on PER: https://archive.org/details/Programming_the_65816/page/n169
- snes9x implementation of PER: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1685
- undisbeliever on PER: https://undisbeliever.net/snesdev/65816-opcodes.html#per-push-effective-pc-relative-indirect-address