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LDA: Difference between revisions

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'''LDA''' (Load Accumulator) is a 65x instruction that loads the accumulator.
'''LDA''' (Load Accumulator) is a 65x instruction that loads the accumulator.
{| class="wikitable" style="float:right;clear:right;width:30%"
!colspan="8"|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
|}


[[Category:ASM]]
[[Category:ASM]]

Revision as of 06:01, 2 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