ROL: Difference between revisions

Revision as of 05:50, 2 May 2023

ROL (Rotate Left) is a 65x instruction that rotates a value and the carry flag left one bit. The most significant bit is shifted into the carry flag. The carry flag is shifted into the least significant bit.


Basic Info
Addressing Mode	Opcode	Length	Speed
accumulator	2A	1 byte	2 cycles
absolute	2E	3 bytes	6 cycles
direct page	26	2 bytes	5 cycles
absolute indexed by X	3E	3 bytes	7 cycles
direct page indexed by X	36	2 bytes	6 cycles


Flags Clobbered
N	V	M	X	D	I	Z	C
	.	.	.	.	.

@@ Line 1: / Line 1: @@
 '''ROL''' (Rotate Left) is a 65x instruction that rotates a value and the [[carry flag]] left one bit.  The most significant bit is shifted into the carry flag.  The carry flag is shifted into the least significant bit.
+{| class="wikitable" style="float:right;clear:right;width:30%"
+!colspan="8"|Basic Info
+|+
+|'''Addressing Mode'''
+|'''Opcode'''
+|'''Length'''
+|'''Speed'''
+|+
+|accumulator
+|2A
+|1 byte
+|2 cycles
+|+
+|absolute
+|2E
+|3 bytes
+|6 cycles
+|+
+|direct page
+|26
+|2 bytes
+|5 cycles
+|+
+|absolute indexed by X
+|3E
+|3 bytes
+|7 cycles
+|+
+|direct page indexed by X
+|36
+|2 bytes
+|6 cycles
+|}
 {| class="wikitable" style="float:right;clear:right;width:30%"

Revision as of 05:50, 2 May 2023

See Also