BCS (Super FX): Difference between revisions

Latest revision as of 08:12, 14 July 2024


Basic Info
Addressing Mode	Opcode	Length	ROM Speed	RAM Speed	Cache Speed
Program Counter Relative	0D??	2 bytes	6 cycles	6 cycles	2 cycles


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

BCS (Branch on Carry Set) is a Super FX instruction that performs a conditional jump. The instruction after BCS is already in the pipeline and will run even if the branch occurs.

If CY is clear, BCS does not jump.

No flags are affected.

Syntax

BCS e

Example

Let the carry flag be set. This instruction jumps the program backward 1 byte:

 BCS $-1h

External Links

Official Nintendo documentation on BCS: 9.15 on Page 2-9-16 of Book II
example: page 2-9-17, lbid.

@@ Line 26: / Line 26: @@
 |[[Sign Flag|S]]
 |[[CY]]
-|Z
+|[[Zero Flag|Z]]
 |+
 |.
@@ Line 37: / Line 37: @@
 |}
-'''BCS''' (Branch on carry set) is a [[Super FX]] instruction that performs a conditional jump.
+'''BCS''' (Branch on Carry Set) is a [[Super FX]] instruction that performs a conditional jump.  The instruction after BCS is already in the pipeline and will run even if the branch occurs.
 If [[CY]] is clear, BCS does not jump.
 No flags are affected.
+==== Syntax ====
+<pre>
+BCS e
+</pre>
+==== Example ====
+Let the carry flag be set.  This instruction jumps the program backward 1 byte:
+<pre>
+ BCS $-1h
+</pre>
 === See Also ===