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TXA: Difference between revisions

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* [[Eyes & Lichty]] page 517, on TXA: https://archive.org/details/0893037893ProgrammingThe65816/page/n543
* [[Eyes & Lichty]] page 517, on TXA: https://archive.org/details/0893037893ProgrammingThe65816/page/n543
* [[Labiak]] page 198 on TXA: https://archive.org/details/Programming_the_65816/page/n208
* [[Labiak]] page 198 on TXA: https://archive.org/details/Programming_the_65816/page/n208
* [[MCS6500 Manual]] page on TXA: https://archive.org/details/mos_microcomputers_programming_manual/page/n118
* [[MCS6500 Manual]] page 100 on TXA: https://archive.org/details/mos_microcomputers_programming_manual/page/n118
* [[Carr]] page 276 on TXA: https://archive.org/details/6502UsersManual/page/n289
* [[Carr]] page 276 on TXA: https://archive.org/details/6502UsersManual/page/n289
* [[Leventhal]] page 3-102 on TXA: https://archive.org/details/6502-assembly-language-programming/page/n151
* [[Leventhal]] page 3-102 on TXA: https://archive.org/details/6502-assembly-language-programming/page/n151

Revision as of 04:16, 6 December 2023

Basic Info
Addressing Mode Opcode Length Speed
Implied (type 1) 8A 1 byte 2 cycles
Flags Affected
N V M X D I Z C
. . . . . .

TXA is a 65x instruction that transfers the value of the X index register to the accumulator.

Instruction Behavior
8-bit accumulator (m=1) 16-bit accumulator (m=0)
8-bit index registers (x=1) 8 bits are transferred 8 bits are transferred to the low byte of accumulator and high byte of the accumulator is zeroed
16-bit index registers (x=0) 8 bits are transferred 16 bits are transferred

See Also

External Links