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LDA
From SnesLab
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
- Eyes & Lichty page on LDA: https://archive.org/details/0893037893ProgrammingThe65816/page/n488
- Labiak page on LDA: https://archive.org/details/Programming_the_65816/page/n159
- MCS6500 Manual page on LDA: https://archive.org/details/mos_microcomputers_programming_manual/page/n19
- Carr page on LDA: https://archive.org/details/6502UsersManual/page/n276