We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

GETBS (Super FX): Difference between revisions

From SnesLab
Jump to: navigation, search
(linkify S)
Line 47: Line 47:


=== External Links ===
=== External Links ===
* Official Super Nintendo development manual on GETBS: [https://archive.org/details/SNESDevManual/book2/page/n211 Page 2-9-55 of Book II]
* Official Super Nintendo development manual on GETBS: 9.38 on [https://archive.org/details/SNESDevManual/book2/page/n211 page 2-9-55 of Book II]
* example: [https://archive.org/details/SNESDevManual/book2/page/n212 page 2-9-56 of Book II], lbid
* example: [https://archive.org/details/SNESDevManual/book2/page/n212 page 2-9-56 of Book II], lbid



Revision as of 20:53, 1 July 2024

Basic Info
Opcode Length ROM Speed RAM Speed Cache Speed
3FEF 2 bytes 6 to 10 cycles 6 to 9 cycles 2 to 6 cycle
Flags Affected
B ALT1 ALT2 O/V S CY Z
0 0 0 . . . .

GETBS 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.

gsu getbs.png

See Also

External Links