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MOVW (SPC700): Difference between revisions

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'''MOVW''' is an [[SPC700]] instruction that moves a 16-bit [[ARAM]] value to or from the [[YA]] register.
'''MOVW''' (Move Word) is an [[SPC700]] instruction that moves a 16-bit [[ARAM]] value to or from the [[YA]] register.


=== Example ===
=== Example ===

Revision as of 02:44, 22 June 2023

MOVW (Move Word) is an SPC700 instruction that moves a 16-bit ARAM value to or from the YA register.

Example

From the IPL ROM, 

MOVW YA, $F6	; load the byte at ARAM location $F6 into A and the byte at $F7 into Y
MOVW $00, YA	; store the value in Y to ARAM location $01 and the value in A to $00
Basic Info (to YA)
Addressing Mode Opcode Length Speed
BA 2 bytes 5 cycles
Flags Clobbered (to YA)
N V P B H I Z C
. . . . .
Basic Info (from YA)
Addressing Mode Opcode Length Speed
DA 2 bytes 4 cycles
Flags Clobbered (from YA)
N V P B H I Z C
. . . . . . . .

See Also

External Links

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