AND: Difference between revisions

Revision as of 03:09, 25 November 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
Immediate	29	2 bytes	2 cycles*
Absolute	2D	3 bytes	4 cycles*
Absolute Long	2F	4 bytes	5 cycles*
Direct Page	25	2 bytes	3 cycles*
Direct Page Indirect	32	2 bytes	5 cycles*
Direct Page Indirect Long	27	2 bytes	6 cycles*
absolute indexed by X	3D	3 bytes	4 cycles*
absolute long indexed by X	3F	4 bytes	5 cycles*
absolute indexed by Y	39	3 bytes	4 cycles*
direct page indexed by X	35	2 bytes	4 cycles*
direct page indirect indexed by X	21	2 bytes	6 cycles*
direct page indirect indexed by Y	31	2 bytes	5 cycles*
direct page indirect long indexed by Y	37	2 bytes	6 cycles*
Stack Relative	23	2 bytes	4 cycles*
stack relative indirect indexed by Y	33	2 bytes	7 cycles*


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

AND is a 65x instruction that performs a logical AND.

In all addressing modes, AND takes one extra cycle when the accumulator is 16 bits wide.
In direct page addressing modes only, AND takes an extra cycle if the low byte of the direct page register is nonzero.
In both Absolute Indexed addressing modes and DP Indirect Indexed by Y admodes, AND takes an extra cycle if adding the index crosses a page boundary.

@@ Line 105: / Line 105: @@
 |}
-'''AND''' is a 65x instruction that performs a logical AND.  In all [[addressing modes]], AND takes one extra cycle when the accumulator is 16 bits wide.  In [[direct page addressing]] modes only, AND takes an extra cycle if the low byte of the [[direct page register]] is nonzero.  In both [[Absolute Indexed]] addressing modes and DP Indirect Indexed by Y admodes, AND takes an extra cycle if adding the index crosses a page boundary.
+'''AND''' is a 65x instruction that performs a logical AND.
+===== Cycle Penalties =====
+* In all [[addressing modes]], AND takes one extra cycle when the accumulator is 16 bits wide.
+* In [[direct page addressing]] modes only, AND takes an extra cycle if the low byte of the [[direct page register]] is nonzero.
+* In both [[Absolute Indexed]] addressing modes and DP Indirect Indexed by Y admodes, AND takes an extra cycle if adding the index crosses a page boundary.
 === See Also ===