We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
BPL: Difference between revisions
From SnesLab
(snes9x implementation) |
(moved tables up) |
||
| Line 1: | Line 1: | ||
{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
| Line 36: | Line 34: | ||
|. | |. | ||
|} | |} | ||
'''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." | |||
=== See Also === | === See Also === | ||
Revision as of 17:41, 13 July 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| relative | 10 | 2 byte | 3 cycles | ||||
| Flags Clobbered | ||||||||
|---|---|---|---|---|---|---|---|---|
| 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."
See Also
External Links
- Eyes & Lichty page on BPL: https://archive.org/details/0893037893ProgrammingThe65816/page/n460
- Labiak page on BPL: https://archive.org/details/Programming_the_65816/page/n133
- MCS6500 Manual page on BPL: https://archive.org/details/mos_microcomputers_programming_manual/page/n55
- Carr page on BPL: https://archive.org/details/6502UsersManual/page/n264
- Leventhal page on BPL: https://archive.org/details/6502-assembly-language-programming/page/n97
- snes9x implementation of BPL: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1385