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XBA: Difference between revisions

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(nz flag behavior)
(XBA image)
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The [[negative flag]] will match the most significant bit of the new low byte (A) of the accumulator.
The [[negative flag]] will match the most significant bit of the new low byte (A) of the accumulator.
The [[zero flag]] will be set if and only if the new low byte (A) of the accumulator is zero, otherwise it is cleared.
The [[zero flag]] will be set if and only if the new low byte (A) of the accumulator is zero, otherwise it is cleared.
[[File:xba.png]]


=== See Also ===
=== See Also ===

Revision as of 20:03, 27 June 2024

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."

The negative flag will match the most significant bit of the new low byte (A) of the accumulator. The zero flag will be set if and only if the new low byte (A) of the accumulator is zero, otherwise it is cleared.

xba.png

See Also

External Links