W65C816S Datasheet, PDF (23/62 Pages) List of Unclassifed Manufacturers – Microprocessor

The Western Design Center, Inc.
W65C816S Data Sheet
Direct Indexed Indirect-(d,x)
Direct Indexed Indirect ((d,x)) addressing is often referred to as Indirect X addressing. The second byte of the
instruction is added to the sum of the Direct Register and the X Index Register. The result points to the X
low-order 16 bits of the effective address. The Data Bank Register contains the high-order 8 bits of the effective
address.
Instruction:
then:
+
Operand Address:
OpCode
+
+
00
DBR
offset
Direct Register
offset
direct address
X Reg
(address)
effective address
Direct Indexed with X-d,x
With Direct Indexed with X (d,x) addressing the second byte of the instruction is added to the sum of the Direct
Register and the X Index Register to form the 16-bit effective address. The operand is always in Bank 0.
Instruction:
OpCode
+
Operand Address:
+
00
offset
Direct Register
offset
direct address
X Reg
effective address
Direct Indexed with Y-d,y
With Direct Indexed with Y (d,y) addressing the second byte of the instruction is added to the sum of the Direct
Register and the Y Index Register to form the 16-bit effective address. The operand is always in Bank 0.
Instruction:
OpCode
+
Operand Address:
+
00
offset
Direct Register
offset
direct address
Y Reg
effective address
The Western Design Center
W65C816S
23