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ROR (SPC700): Difference between revisions

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'''ROR''' is an [[SPC700]] instruction that rotates its operand one bit to the right.  The old value of the [[carry flag]] is rotated into the most significant bit.  The least significant bit is rotated into the carry flag.
'''ROR''' is an [[SPC700]] instruction that rotates every bit of its operand one bit to the right.  The old value of the [[carry flag]] is rotated into the most significant bit.  The least significant bit is rotated into the carry flag.  A total of 9 bits are rotated.


The official manual has the bit shift operators for ROR pointing the wrong way.
The official manual has the bit shift operators for ROR pointing the wrong way.
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ROR !abs
ROR !abs
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</pre>
[[File:ror.png]]


=== See Also ===
=== See Also ===
* [[ROL (SPC700)]]
* [[ROL (SPC700)]]
* [[LSR (SPC700)]]
* [[ROR]]
* [[ROR]]
* [[ROR (Super FX)]]
* [[ROR (Super FX)]]

Latest revision as of 19:34, 4 August 2024

Basic Info
Addressing Mode Opcode Length Speed
Accumulator 7C 1 byte 2 cycles
Direct Page 6B 2 bytes 4 cycles
Direct Page Indexed by X 7B 2 bytes 5 cycles
Absolute 6C 3 bytes 5 cycles
Flags Affected
N V P B H I Z C
N . . . . . Z C

ROR is an SPC700 instruction that rotates every bit of its operand one bit to the right. The old value of the carry flag is rotated into the most significant bit. The least significant bit is rotated into the carry flag. A total of 9 bits are rotated.

The official manual has the bit shift operators for ROR pointing the wrong way.

Syntax

ROR A
ROR dp
ROR dp+X
ROR !abs

ror.png

See Also

External Links