Addressing modes

Available addressing modes are listed below.

• Accumulator. The operand is the Accumulator.
• Absolute. The operand is located at a given absolute address (16-bit addressing-space).
• Absolute, X-Indexed. The operand is located at the absolute address + the X index value.
• Absolute, Y-Indexed. The operand is located at the absolute address + the Y index value.
• Immediate. The operand is encoded with the instruction.
• Implied. The operand is implicit in the context of the instruction (not provided by the user).
• Indirect. The address field in the instruction contains the memory location where the effective address of the operand is present.
• X-indexed, indirect. The value at the address field in the instruction plus the X register points to the memory location where the effective address of the operand is present.
• Indirect, Y-indexed. The operand is the same as in an indirect access, except the obtained value is added with the Y register.
• Relative. The operand is the PC + a signed offset (used for branching).
• Zeropage. The operand is a zeropage address (single byte).
• Zeropage X-indexed. The operand is a zeropage address incremented by X.
• Zeropage Y-indexed. The operand is a zeropage address incremented by Y.