ASL (SPC700): Difference between revisions

Revision as of 19:25, 6 July 2024


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
	.	.	.	.	.

ASL (Arithmetic Shift Left) is an SPC700 instruction that shifts 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

External Links

Official Super Nintendo development manual on ASL: Appendix C-7 of Book I

@@ Line 51: / Line 51: @@
 '''ASL''' (Arithmetic Shift Left) is an [[SPC700]] instruction that shifts 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 ====
+<pre>
+ASL A
+ASL dp
+ASL dp+x
+ASL !abs
+</pre>
 === See Also ===