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ASL (SPC700): Difference between revisions

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'''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]].
'''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 ====
==== Syntax ====
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ASL !abs
ASL !abs
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[[File:asl_spc.png]]


=== See Also ===
=== See Also ===

Latest revision as of 00:05, 15 August 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
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

asl spc.png

See Also

External Links