LDB (Super FX): Difference between revisions

Latest revision as of 03:04, 16 December 2023


Basic Info
Opcode	Length	ROM Speed	RAM Speed	Cache Speed
3D4m	2 byte	11 cycles	13 cycles	6 cycle


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
0	0	0	.	.	.	.

LDB (Load Byte) is a Super FX instruction that loads one byte from the Game Pak and stores it in the low byte of the destination register. The low byte of the destination register is zeroed.

External Links

Official Super Nintendo development manual on LDB: Page 2-9-64 of Book II
example: Page 2-9-65, lbid.

@@ Line 16: / Line 16: @@
 {| class="wikitable" style="float:right;clear:right;width:30%"
-!colspan="9"|Flags Clobbered
+!colspan="9"|Flags Affected
 |+
 |B
-|ALT1
+|[[ALT1]]
-|ALT2
+|[[ALT2]]
-|O/V
+|[[O/V]]
 |S
-|CY
+|[[CY]]
 |Z
 |+
@@ Line 35: / Line 35: @@
 |}
-'''LDB''' (Load Byte) is a [[Super FX]] instruction that loads one byte from the [[Game Pak]].
+'''LDB''' (Load Byte) is a [[Super FX]] instruction that loads one byte from the [[Game Pak]] and stores it in the low byte of the [[destination register]].  The low byte of the destination register is zeroed.
 === See Also ===
@@ Line 42: / Line 42: @@
 === External Links ===
 * Official Super Nintendo development manual on LDB: [https://archive.org/details/SNESDevManual/book2/page/n220 Page 2-9-64 of Book II]
+* example: [https://archive.org/details/SNESDevManual/book2/page/n221 Page 2-9-65], lbid.
 [[Category:ASM]]
 [[Category:Super FX]]
 [[Category:Data Transfer Instructions]]