We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

LDA: Difference between revisions

From SnesLab
Jump to: navigation, search
(Category load/store)
(linkify admodes)
Line 27: Line 27:
|3 cycles*
|3 cycles*
|+
|+
|direct page indirect
|[[Direct Page Indirect]]
|B2
|B2
|2 bytes
|2 bytes
|5 cycles*
|5 cycles*
|+
|+
|direct page indirect long
|[[Direct Page Indirect Long]]
|A7
|A7
|2 bytes
|2 bytes

Revision as of 08:30, 25 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