w65c816s Western Design Center, Inc., w65c816s Datasheet - Page 22

• Manufacturer Part Number: w65c816s
• Description: W65c816s 8/16?bit Microprocessor
• Manufacturer: Western Design Center, Inc.

3.5.14 Direct Indirect Long Indexed-[d],y
With Direct Indirect Long Indexed ([d],y) addressing the 24-bit base address is pointed to by the sum
of the second byte of the instruction and the Direct Register. The effective address is this 24-bit base
address plus the Y Index Register.
3.5.15 Direct Indirect Long-[d]
With Direct Indirect Long ([d]) addressing the second byte of the instruction is added to the Direct
Register to form a pointer to the 24-bit effective address.
3.5.16 Direct Indirect-(d)
With Direct Indirect ((d)) addressing the second byte of the instruction is added to the Direct Register to
form a pointer to the low-order 16 bits of the effective address. The Data Bank Register contains the
high-order 8 bits of the effective address.
then:
Instruction:
then
Instruction:
Instruction:
Operand
Address:
Operand
Address:
Operand
Address:
then:
+
Opcode
Opcode
Opcode
DBR
00
00
00
+
+
+
effective address
effective address
direct address
base address
offset
offset
offset
(direct address)
(direct address)
Direct Register
Direct Register
Direct Register
direct address
+
Y Reg
offset
offset
offset
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