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LSR: Difference between revisions

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=== External Links ===
=== External Links ===
* [[Eyes & Lichty]] page on LSR: https://archive.org/details/0893037893ProgrammingThe65816/page/n491
* [[Eyes & Lichty]] page 465, on LSR: https://archive.org/details/0893037893ProgrammingThe65816/page/n491
* [[Labiak]] page on LSR: https://archive.org/details/Programming_the_65816/page/n162
* [[Labiak]] page on LSR: https://archive.org/details/Programming_the_65816/page/n162
* [[MCS6500 Manual]] page on LSR: https://archive.org/details/mos_microcomputers_programming_manual/page/n169
* [[MCS6500 Manual]] page on LSR: https://archive.org/details/mos_microcomputers_programming_manual/page/n169

Revision as of 03:59, 21 November 2023

Basic Info
Addressing Mode Opcode Length Speed
Accumulator 4A 1 byte 2 cycles
Absolute 4E 3 bytes 6 cycles*
Direct Page 46 2 bytes 5 cycles*
absolute indexed X 5E 3 bytes 7 cycles*
direct page indexed X 56 2 bytes 6 cycles*
Flags Affected
N V M X D I Z C
0 . . . . .

LSR (Logical Shift Right) is a 65x instruction that shifts a value one bit to the right (division by two). The most significant bit becomes a zero. The least significant bit is shifted into the carry flag.

Cycle Penalties

See Also

External Links