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BCS: Difference between revisions
From SnesLab
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=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/429 page 429] on BCS | ||
* [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n129 page 119] on BCS | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n129 page 119] on BCS | ||
* [[MCS6500 Manual]] page 40 on BCS: https://archive.org/details/mos_microcomputers_programming_manual/page/n55 | * [[MCS6500 Manual]] page 40 on BCS: https://archive.org/details/mos_microcomputers_programming_manual/page/n55 | ||
Revision as of 12:46, 6 August 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
- Labiak, page 119 on BCS
- 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