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PER: Difference between revisions
From SnesLab
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* 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 | ||
* Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.8.1 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Revision as of 14:00, 4 August 2024
| 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.
No flags are affected.
Syntax
PER label
See Also
External Links
- Eyes & Lichty page 475, on PER: https://archive.org/details/0893037893ProgrammingThe65816/page/475
- 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
- Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.8.1