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CMP
From SnesLab
Basic Info | |||||||
---|---|---|---|---|---|---|---|
Addressing Mode | Opcode | Length | Speed | ||||
immediate | C9 | 2 bytes | 2 cycles | ||||
absolute | CD | 3 bytes | 4 cycles | ||||
absolute long | CF | 4 bytes | 5 cycles | ||||
direct page | C5 | 2 bytes | 3 cycles | ||||
direct page indirect | D2 | 2 bytes | 5 cycles | ||||
direct page indirect long | C7 | 2 bytes | 6 cycles | ||||
absolute indexed by X | DD | 3 bytes | 4 cycles | ||||
absolute long indexed by X | DF | 4 bytes | 5 cycles | ||||
absolute indexed by Y | D9 | 3 bytes | 4 cycles | ||||
direct page indexed by X | D5 | 2 bytes | 4 cycles | ||||
direct page indexed indirect by X | C1 | 2 bytes | 6 cycles | ||||
direct page indirect indexed by Y | D1 | 2 bytes | 5 cycles | ||||
direct page indirect long indexed by Y | D7 | 2 bytes | 6 cycles | ||||
stack relative | C3 | 2 bytes | 4 cycles | ||||
stack relative indirect indexed by Y | D3 | 2 bytes | 7 cycles |
Flags Clobbered | ||||||||
---|---|---|---|---|---|---|---|---|
N | V | M | X | D | I | Z | C | |
. | . | . | . | . |
CMP (Compare) is a 65x instruction that compares the value of the accumulator.
See Also
External Links
- Eyes & Lichty page on CMP: https://archive.org/details/0893037893ProgrammingThe65816/page/n471
- Labiak page on CMP: https://archive.org/details/Programming_the_65816/page/n143
- MCS6500 Manual page on CMP: https://archive.org/details/mos_microcomputers_programming_manual/page/n60
- Carr page on CMP: https://archive.org/details/6502UsersManual/page/n268
- Leventhal page on CMP: https://archive.org/details/6502-assembly-language-programming/page/n105
- snes9x implementation of CMP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L304
- undisbeliever on CMP: https://undisbeliever.net/snesdev/65816-opcodes.html#cmp-compare-accumulator-with-memory