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LDW (Super FX)
From SnesLab
(Redirected from LDW)
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied Indirect | 4m | 1 byte | 10 cycles | 12 cycles | 7 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
LDW (Load Word) is a Super FX instruction that loads one word from the Game Pak into the destination register. The cycle times recorded here include the time spent while the load is happening, when the GSU is in the wait state.
The ALT0 state is restored.
The destination registers should be specified in advance using WITH or TO. Otherwise, R0 serves as the default.
Syntax
LDW (Rm)
where m can be from 0~11
Example
Let:
Dreg : R5 R3 = 6480h (70:6480h) = C0h RAMBR = 70h
After executing LDW (R3):
R5 = C02eh
See Also
External Links
- Official Super Nintendo development manual on LDW: 9.46 on Page 2-9-66 of Book II