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CBNE (SPC700): Difference between revisions

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'''CBNE''' is an [[SPC700]] instruction that performs a comparison between the [[accumulator]] and a [[direct page]] value and then branches if they are not equal.  The direct page index is the first operand and also the first byte immediately following the opcode, and the relative branch offset is the second operand, the second byte following the opcode.
'''CBNE''' is an [[SPC700]] instruction that performs a comparison between the [[accumulator]] and a [[direct page]] value and then branches if they are not equal.  The direct page index is the first operand and also the first byte immediately following the opcode, and the relative branch offset is the second operand, the second byte following the opcode.
No flags are affected.


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

Revision as of 20:41, 6 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Direct Page / Program Counter Relative 2E 3 bytes when condition is false: 5 cycles

when condition is true: 7 cycles

Direct Page Indexed by X / Program Counter Relative DE 3 bytes when condition is false: 6 cycles

when condition is true: 8 cycles

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

CBNE is an SPC700 instruction that performs a comparison between the accumulator and a direct page value and then branches if they are not equal. The direct page index is the first operand and also the first byte immediately following the opcode, and the relative branch offset is the second operand, the second byte following the opcode.

No flags are affected.

See Also

External Links