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LDA: Difference between revisions

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(linkify dp)
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|4 cycles*
|4 cycles*
|+
|+
|absolute long
|[[Absolute Long]]
|AF
|AF
|4 bytes
|4 bytes
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|6 cycles*
|6 cycles*
|+
|+
|stack relative
|[[Stack Relative]]
|A3
|A3
|2 bytes
|2 bytes

Revision as of 07:34, 21 November 2023

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 Affected
N V M X D I Z C
. . . . . .

LDA (Load Accumulator) is a 65x instruction that loads the accumulator. In immediate addressing only, LDA is a total of 3 bytes long when the accumulator is 16 bits wide.

Cycle Penalties

See Also

External Links