We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
XBA: Difference between revisions
From SnesLab
(→External Links: page number) |
(added alternate mmenonic) |
||
| Line 35: | Line 35: | ||
|} | |} | ||
'''XBA''' is an instruction that exchanges the high byte (B) and low byte (typically called A) of the [[C accumulator]]. It works even in [[6502 emulation mode]]. In [[65816 native mode]], its mnemonic is still "XBA" even when the accumulator is 16-bits wide. | '''XBA''' is an instruction that exchanges the high byte (B) and low byte (typically called A) of the [[C accumulator]]. It works even in [[6502 emulation mode]]. In [[65816 native mode]], its standard mnemonic is still "XBA" even when the accumulator is 16-bits wide. An alternative mnemonic is "SWA." | ||
=== See Also === | === See Also === | ||
Revision as of 20:36, 22 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 1) | EB | 1 byte | 3 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| . | . | . | . | . | . | ||
XBA is an instruction that exchanges the high byte (B) and low byte (typically called A) of the C accumulator. It works even in 6502 emulation mode. In 65816 native mode, its standard mnemonic is still "XBA" even when the accumulator is 16-bits wide. An alternative mnemonic is "SWA."
See Also
External Links
- Eyes & Lichty page 524, on XBA: https://archive.org/details/0893037893ProgrammingThe65816/page/n550
- Labiak page on XBA: https://archive.org/details/Programming_the_65816/page/n214
- snes9x implementation of XBA: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L3261
- undisbeliever on XBA: https://undisbeliever.net/snesdev/65816-opcodes.html#xba-exchange-the-b-and-a-accumulators