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BCS: Difference between revisions
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'''BCS''' (Branch if Carry Set) is a 65x instruction that performs a jump if the [[carry flag]] is set. An alternate mnemonic is "BGE." | '''BCS''' (Branch if Carry Set) is a 65x instruction that performs a jump if the [[carry flag]] is set. An alternate mnemonic is "BGE." | ||
If carry is clear, control simply falls through to the next instruction. | |||
No flags are affected. | No flags are affected. | ||
Revision as of 10:55, 15 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Program Counter Relative | B0 | 2 bytes | 2 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
BCS (Branch if Carry Set) is a 65x instruction that performs a jump if the carry flag is set. An alternate mnemonic is "BGE."
If carry is clear, control simply falls through to the next instruction.
No flags are affected.
Syntax
BCS nearlabel BGE nearlabel
See Also
External Links
- Eyes & Lichty page 429, on BCS: https://archive.org/details/0893037893ProgrammingThe65816/page/429
- Labiak page 119 on BCS: https://archive.org/details/Programming_the_65816/page/n129
- MCS6500 Manual page 40 on BCS: https://archive.org/details/mos_microcomputers_programming_manual/page/n55
- Carr page 248 on BCS: https://archive.org/details/6502UsersManual/page/n261
- Leventhal page 3-44 on BCS: https://archive.org/details/6502-assembly-language-programming/page/n93
- snes9x implementation of BCS:https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1365