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IWT (Super FX): Difference between revisions

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'''IWT''' (Immediate Word Data?) is a [[Super FX]] instruction that loads two immediate bytes into a register.  Any register from R<sub>0</sub> to R<sub>15</sub> may be specified.
'''IWT''' (Immediate Word Transfer) is a [[Super FX]] instruction that loads two immediate bytes into a register.  Any register from R<sub>0</sub> to R<sub>15</sub> may be specified.
 
The [[ALT0]] state is restored.


==== Syntax ====
==== Syntax ====
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IWT Rn, #xx
IWT Rn, #xx
</pre>
</pre>
==== Example ====
When:
IWT R<sub>0</sub>, #4583h
is executed:
R<sub>0</sub> = 4583h


=== Trivia ===
=== Trivia ===
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* [[IBT]]
* [[IBT]]
* [[LDA]]
* [[LDA]]
* [[LDX]]
* [[LDY]]
* [[LEA]]
* [[LEA]]



Latest revision as of 01:55, 16 July 2024

Basic Info
Addressing Mode Opcode Length ROM Speed RAM Speed Cache Speed
Immediate Fnxxxx 3 bytes 9 cycles 9 cycles 3 cycle
Flags Affected
B ALT1 ALT2 O/V S CY Z
0 0 0 . . . .

IWT (Immediate Word Transfer) is a Super FX instruction that loads two immediate bytes into a register. Any register from R0 to R15 may be specified.

The ALT0 state is restored.

Syntax

IWT Rn, #xx

Example

When:

IWT R0, #4583h

is executed:

R0 = 4583h

Trivia

The official Super Nintendo development manual mispells the mnemonic as "ITW" in the opcode diagram.[1] The low byte of the immediate value is loaded before the high byte.

See Also

External Links

  1. Official Nintendo documentation on IWT: 9.43 on Page 2-9-62 of Book II