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EOR: Difference between revisions

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(→‎External Links: hid archive URL for Carr)
(→‎External Links: hid archive URL for Leventhal)
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* [[MCS6500 Manual]] page 21 on EOR: https://archive.org/details/mos_microcomputers_programming_manual/page/n36
* [[MCS6500 Manual]] page 21 on EOR: https://archive.org/details/mos_microcomputers_programming_manual/page/n36
* [[Carr]], [https://archive.org/details/6502UsersManual/page/n272 page 259] on EOR
* [[Carr]], [https://archive.org/details/6502UsersManual/page/n272 page 259] on EOR
* [[Leventhal]] page 3-63 on EOR: https://archive.org/details/6502-assembly-language-programming/page/n112
* [[Leventhal]], [https://archive.org/details/6502-assembly-language-programming/page/n112 page 3-63] on EOR
* snes9x implementation of EOR: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L533
* snes9x implementation of EOR: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L533
* undisbeliever on EOR: https://undisbeliever.net/snesdev/65816-opcodes.html#eor-exclusive-or-accumulator-with-memory
* undisbeliever on EOR: https://undisbeliever.net/snesdev/65816-opcodes.html#eor-exclusive-or-accumulator-with-memory

Revision as of 18:19, 7 August 2024

Basic Info
Addressing Mode Opcode Length Speed
Immediate 49 2/3 bytes 2 cycles*
Absolute 4D 3 bytes 4 cycles*
Absolute Long 4F 4 bytes 5 cycles*
Direct Page 45 2 bytes 3 cycles*
Direct Page Indirect 52 2 bytes 5 cycles*
Direct Page Indirect Long 47 2 bytes 6 cycles*
Absolute Indexed by X 5D 3 bytes 4 cycles*
Absolute Long Indexed by X 5F 4 bytes 5 cycles*
Absolute Indexed by Y 59 3 bytes 4 cycles*
Direct Page Indexed by X 55 2 bytes 4 cycles*
Direct Page Indexed Indirect by X 41 2 bytes 6 cycles*
Direct Page Indirect Indexed by Y 51 2 bytes 5 cycles*
Direct Page Indirect Long Indexed by Y 57 2 bytes 6 cycles*
Stack Relative 43 2 bytes 4 cycles*
Stack Relative Indirect Indexed by Y 53 2 bytes 7 cycles*
Flags Affected
N V M X D I Z C
N . . . . . Z .

EOR is a 65x instruction that performs an exclusive or between its operand and the accumulator. The result is stored in the accumulator.

Syntax

EOR #const
EOR addr
EOR long
EOR dp
EOR (dp)
EOR [dp]
EOR addr, X
EOR long, X
EOR addr, Y
EOR dp, X
EOR (dp, X)
EOR (dp), Y
EOR [dp], Y
EOR sr, S
EOR (sr, S), Y
Cycle Penalties

See Also

External Links