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ASL

Category
Reference/6502 Programming/Assembly

Topic
ASL (Arithmetic Shift Left)
ASL shifts all bits left one position. 0 is shifted into bit 0 and the original bit 7 is shifted into the Carry.

Affects flags: S Z C

Addressing mode	Syntax	Opcode	Bytes	Cycles
Accumulator	ASL A	$0A	1	2
Zero Page	ASL $44	$06	2	5
Zero Page,X	ASL $44,X	$16	2	6
Absolute	ASL $4400	$0E	3	6
Absolute,X	ASL $4400,X	$1E	3	7

Example
LDA #$43
ASL A at this point, A=$86 ($43 * 2).

See also
ROL