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PEA: Difference between revisions
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'''PEA''' (Push Effective Address) is a [[65c816]] instruction that pushes a 16-bit value to the [[stack]]. This value need not actually be an address. The [[stack pointer]] is decremented by two. | '''PEA''' (Push Effective Address) is a [[65c816]] instruction that pushes a 16-bit value to the [[stack]]. This value need not actually be an address. The [[stack pointer]] is decremented by two. | ||
PEA can be thought of as using [[immediate addressing]], although the immediate syntax is not used. | |||
No flags are affected. | No flags are affected. | ||
Revision as of 19:26, 12 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack (absolute) | F4 | 3 bytes | 5 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
PEA (Push Effective Address) is a 65c816 instruction that pushes a 16-bit value to the stack. This value need not actually be an address. The stack pointer is decremented by two.
PEA can be thought of as using immediate addressing, although the immediate syntax is not used.
No flags are affected.
Syntax
PEA addr
See Also
External Links
- Eyes & Lichty page 473, on PEA: https://archive.org/details/0893037893ProgrammingThe65816/page/n499
- Labiak page 157 on PEA: https://archive.org/details/Programming_the_65816/page/n167
- snes9x implementation of PEA: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1631
- undisbeliever on PEA: https://undisbeliever.net/snesdev/65816-opcodes.html#pea-push-effective-absolute-address