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IWT (Super FX): Difference between revisions
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'''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. | '''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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* [[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
- Official Nintendo documentation on IWT: 9.43 on Page 2-9-62 of Book II