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ASL: Difference between revisions

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=== External Links ===
=== External Links ===
* [[Eyes & Lichty]] page 427, on ASL: https://archive.org/details/0893037893ProgrammingThe65816/page/n453
* [[Eyes & Lichty]] page 427, on ASL: https://archive.org/details/0893037893ProgrammingThe65816/page/427
* lbid page 190, before & after diagram of ASL: https://archive.org/details/0893037893ProgrammingThe65816/page/n216
* lbid page 190, before & after diagram of ASL: https://archive.org/details/0893037893ProgrammingThe65816/page/n216
* [[Labiak]] page 117 on ASL: https://archive.org/details/Programming_the_65816/page/n127
* [[Labiak]] page 117 on ASL: https://archive.org/details/Programming_the_65816/page/n127

Revision as of 10:59, 15 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Accumulator 0A 1 byte 2 cycles
Absolute 0E 3 bytes 6 cycles*
Direct Page 06 2 bytes 5 cycles*
Absolute Indexed by X 1E 3 bytes 7 cycles*
Direct Page Indexed by X 16 2 bytes 6 cycles*
Flags Affected
N V M X D I Z C
. . . . .

ASL (Arithmetic Shift Left) is a 65x instruction that shifts a value by left one bit (multiplication by two). The most significant bit is shifted into the carry flag. The least significant bit becomes a zero.

Syntax

ASL
ASL A
ASL addr
ASL dp
ASL addr, X
ASL dp, X
Cycle Penalties

asl.png

See Also

External Links