This addressing mode is used to access data with variable addresses through the HX index register of the HC08 controller. The X index register contains the least significant byte of the operand while the H index register contains the most significant byte.
Indexed, no offset instructions are one byte long. See the following listing for an example of using the indexed (no offset) addressing mode.
... Entry: ... LDHX #$0FFE LDA ,X ... JMP ,X ...
The value stored in memory location $0FFE is loaded into accumulator A. The JMP instruction causes the program to jump to the address pointed to by the HX register.