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BPL: Difference between revisions

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'''BPL''' (Branch if PLus) is a 65x instruction that performs a jump if the [[negative flag]] is clear.  Note that zero is considered positive in the 65x architecture, so this instruction's behavior might be more accurately be described as "branch if non-negative."  BPL takes one additional cycle if the branch is taken, and another if that branch crosses a page boundary in [[emulation mode]].  
'''BPL''' (Branch if PLus) is a 65x instruction that performs a jump if the [[negative flag]] is clear.  Note that zero is considered positive in the 65x architecture, so this instruction's behavior might be more accurately be described as "branch if non-negative."   
 
===== Cycle Penalties =====
* BPL takes one additional cycle if the branch is taken
* BPL takes another extra cycle if that branch taken crosses a page boundary in [[emulation mode]].  


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

Revision as of 02:41, 25 November 2023

Basic Info
Addressing Mode Opcode Length Speed
relative 10 2 byte 2 cycles*
Flags Affected
N V M X D I Z C
. . . . . . . .

BPL (Branch if PLus) is a 65x instruction that performs a jump if the negative flag is clear. Note that zero is considered positive in the 65x architecture, so this instruction's behavior might be more accurately be described as "branch if non-negative."

Cycle Penalties
  • BPL takes one additional cycle if the branch is taken
  • BPL takes another extra cycle if that branch taken crosses a page boundary in emulation mode.

See Also

External Links

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