MOVE (Super FX): Difference between revisions

Revision as of 02:42, 16 July 2024


Basic Info
Addressing Mode	Opcode	Length	ROM Speed	RAM Speed	Cache Speed
	2n'1n	2 bytes	6 cycles	6 cycles	2 cycles


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
0	0	0	.	.	.	.

MOVE is the name of a Super FX instruction and macro instructions that moves the value of a register or immediate value into another register or RAM.

The ALT0 state is restored.

Syntax

MOVE Rn, Rn'
MOVE Rn, #xx
MOVE Rn, (xx)
MOVE (xx), Rn

MOVE R_n, R_n'

MOVE R_n, R_n' as a GSU instruction transfers the value from R_n' to R_n. The opcode is strictly speaking an alterantive execution of TO, namely when the B flag is set i.e. a TO is executed immediately after a WITH. The register of WITH R_n' is the source and the register of TO R_n is the destination (for this reason, it is safe to assume that the transfer happens from S_reg to D_reg).

As such, the execution of both codes are identical:

; R0 = 52BAh
WITH R0
TO R13
; R13 also is now 52BAh

; R0 = 52BAh
WITH R13,R0
; R13 also is now 52BAh

Example 1

Let:

R₁₄ = 4983h
R₈ = 9264h

when MOVE R₈, R₁₄ is executed:

R₈ = 4983h

Example 2

MOVE R₈, #070h   ; 0070h -> R₈  (IBT R₈, #070h)
MOVE R₈, #0A4h   ; 00a4h -> R₈  (IWT R₈, #0A4h)
MOVE R₈, #-128   ; ff80h -> R₈  (IBT R₈, #-128)

External Links

Official Super Nintendo development manual on MOVE: 9.57 on page 2-9-81 of Book II
Official Super Nintendo development manual on TO: 9.57 on page 2-9-48 of Book II

@@ Line 71: / Line 71: @@
 when MOVE R<sub>8</sub>, R<sub>14</sub> is executed:
   R<sub>8</sub> = 4983h
+==== Example 2 ====
+ MOVE R<sub>8</sub>, #070h   ; 0070h -> R<sub>8</sub>  (IBT R<sub>8</sub>, #070h)
+ MOVE R<sub>8</sub>, #0A4h   ; 00a4h -> R<sub>8</sub>  (IWT R<sub>8</sub>, #0A4h)
+ MOVE R<sub>8</sub>, #-128   ; ff80h -> R<sub>8</sub>  (IBT R<sub>8</sub>, #-128)
 === See Also ===