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GETBS (Super FX)

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Basic Info
Addressing Mode Opcode Length ROM Speed RAM Speed Cache Speed
Implied (type 1) 3FEF 2 bytes 6 to 10 cycles 6 to 9 cycles 2 to 6 cycles
Flags Affected
B ALT1 ALT2 O/V S CY Z
0 0 0 . . . .

GETBS (Get Signed Byte) is a Super FX instruction that loads one byte from the ROM buffer into the low byte of the destination register. Every bit of the high byte of the destination register becomes whatever bit 7 of that loaded byte is.

The reason the cycle times can vary is because of the ROM buffer.

Syntax

GETBS

Example

Let:

(ROM buffer) = 85h
Dreg : R8

After executing GETBS:

R8 = ff85h

gsu getbs.png

See Also

External Links