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PEI: Difference between revisions
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'''PEI''' (Push Effective Indirect address) is a [[65c816]] instruction that pushes a 16-bit value to the stack. This value need not actually be an address. PEI takes one additional cycle if the low byte of the [[direct page register]] is nonzero. | '''PEI''' (Push Effective Indirect address) is a [[65c816]] instruction that pushes a 16-bit value to the [[stack]]. This value need not actually be an address. PEI takes one additional cycle if the low byte of the [[direct page register]] is nonzero. | ||
=== See Also === | === See Also === | ||
Revision as of 02:02, 28 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack (Direct Page Indirect) | D4 | 2 bytes | 6 cycles* | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
PEI (Push Effective Indirect address) is a 65c816 instruction that pushes a 16-bit value to the stack. This value need not actually be an address. PEI takes one additional cycle if the low byte of the direct page register is nonzero.
See Also
External Links
- Eyes & Lichty page 474, on PEI: https://archive.org/details/0893037893ProgrammingThe65816/page/n500
- Labiak page 158 on PEI: https://archive.org/details/Programming_the_65816/page/n168
- snes9x implementation of PEI: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1658
- undisbeliever on PEI: https://undisbeliever.net/snesdev/65816-opcodes.html#pei-push-effective-indirect-address