Zilog Z80180 - Manual (Page 197)

Z8018x
Family MPU User Manual
182
UM005003-0703
Indexed (INDX)
The memory operand address is calculated using the contents of an Index
Register (IX or IY) and an 8-bit signed displacement specified in the
instruction. Refer to Figure 77
Figure 77. Indexed Addressing
Extended (EXT)
The memory operand address is specified by two bytes contained in the
instruction, as depicted in Figure 78.
Figure 78. Extended Addressing
Op Code 1
Operand
Memory
Op Code 2
displacement (d)
IX or IY
Op Code
Operand
Memory
n
m
m n