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BRL: Difference between revisions
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'''BRL''' is a [[65c816]] instruction that performs an unconditional jump. The target can be anywhere within the current [[bank]]. | '''BRL''' (Branch Long) is a [[65c816]] instruction that performs an unconditional jump. The target can be anywhere within the current [[bank]]. | ||
The 16 bit operand is not an absolute address, but a signed displacement. | The 16 bit operand is not an absolute address, but a signed displacement from -32768 to 32767. | ||
BRL is relocatable. No flags are affected. | BRL is relocatable. No flags are affected. | ||
==== Syntax ==== | |||
<pre> | |||
BRL label | |||
</pre> | |||
BRL works even in [[emulation mode]]. | |||
=== See Also === | === See Also === | ||
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=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/438 page 438] on BRL | ||
* [[Labiak]] | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n137 page 127] on BRL | ||
* snes9x implementation of BRL: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1405 | * snes9x implementation of BRL: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1405 | ||
* Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.2.1.2 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Latest revision as of 11:57, 6 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Program Counter Relative Long | 82 | 3 bytes | 4 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
BRL (Branch Long) is a 65c816 instruction that performs an unconditional jump. The target can be anywhere within the current bank.
The 16 bit operand is not an absolute address, but a signed displacement from -32768 to 32767.
BRL is relocatable. No flags are affected.
Syntax
BRL label
BRL works even in emulation mode.
See Also
External Links
- Eyes & Lichty, page 438 on BRL
- Labiak, page 127 on BRL
- snes9x implementation of BRL: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1405
- Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.2.1.2