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ROL (SPC700): Difference between revisions

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'''ROL''' is an [[SPC700]] instruction that rotates its operand one bit to the left.  The most significant bit is rotated into the [[carry flag]].  The old value of the carry flag is rotated into the least significant bit.
'''ROL''' is an [[SPC700]] instruction that rotates its operand one bit to the left.  The most significant bit is rotated into the [[carry flag]].  The old value of the carry flag is rotated into the least significant bit.
==== Syntax ====
<pre>
ROL A
ROL dp
ROL dp+X
ROL !abs
</pre>


[[File:rol.png]]
[[File:rol.png]]

Revision as of 19:29, 6 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Accumulator 3C 1 byte 2 cycles
Direct Page 2B 2 bytes 4 cycles
Direct Page Indexed by X 3B 2 bytes 5 cycles
Absolute 2C 3 bytes 5 cycles
Flags Affected
N V P B H I Z C
. . . . .

ROL is an SPC700 instruction that rotates its operand one bit to the left. The most significant bit is rotated into the carry flag. The old value of the carry flag is rotated into the least significant bit.

Syntax

ROL A
ROL dp
ROL dp+X
ROL !abs

rol.png

See Also

External Links