ASL (SPC700)

Basic Info
Addressing Mode	Opcode	Length	Speed
Accumulator	1C	1 byte	2 cycles
Direct Page	0B	2 bytes	4 cycles
Direct Page Indexed by X	1B	2 bytes	5 cycles
Absolute	0C	3 bytes	5 cycles

Flags Affected
N	V	P	B	H	I	Z	C
N	.	.	.	.	.	Z	C

ASL (Arithmetic Shift Left) is an SPC700 instruction that shifts all 8 bits of its operand one bit to the left, more or less multiplying it by two. A zero is shifted into the least significant bit. The most significant bit is shifted into the carry flag.

Syntax

ASL A
ASL dp
ASL dp+x
ASL !abs

See Also

• LSR (SPC700)
• ASL

External Links

• Official Super Nintendo development manual on ASL: Appendix C-7 of Book I
• anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L335