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LDA: Difference between revisions

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* [[Leventhal]] page on LDA: https://archive.org/details/6502-assembly-language-programming/page/n120
* [[Leventhal]] page on LDA: https://archive.org/details/6502-assembly-language-programming/page/n120
* snes9x implementation of LDA: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L678
* snes9x implementation of LDA: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L678
* undisbeliever on LDA: https://undisbeliever.net/snesdev/65816-opcodes.html#lda-load-accumulator-from-memory


[[Category:ASM]]
[[Category:ASM]]
[[Category:Group One Instructions]]
[[Category:Group One Instructions]]
[[Category:Inherited from 6502]]
[[Category:Inherited from 6502]]

Revision as of 04:06, 18 May 2023

LDA (Load Accumulator) is a 65x instruction that loads the accumulator.

Basic Info
Addressing Mode Opcode Length Speed
immediate A9 2 bytes 2 cycles
absolute AD 3 bytes 4 cycles
absolute long AF 4 bytes 5 cycles
direct page A5 2 bytes 3 cycles
direct page indirect B2 2 bytes 5 cycles
direct page indirect long A7 2 bytes 6 cycles
absolute indexed by X BD 3 bytes 4 cycles
absolute long indexed by X BF 4 bytes 5 cycles
absolute indexed by Y B9 3 bytes 4 cycles
direct page indexed by X B5 2 bytes 4 cycles
direct page indexed indirect by X A1 2 bytes 6 cycles
direct page indirect indexed by Y B1 2 bytes 5 cycles
direct page indirect long indexed by Y B7 2 bytes 6 cycles
stack relative A3 2 bytes 4 cycles
stack relative indirect indexed by Y B3 2 bytes 7 cycles
Flags Clobbered
N V M X D I Z C
. . . . . .

External Links