z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 195

• Manufacturer Part Number: z80189
• Description: Z80180, Z8s180, Z8l180 Mpu Operation
• Manufacturer: ZiLOG Semiconductor

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UM005003-0703
Z8018x
Family MPU User Manual
Addressing Modes
The Z80180 instruction set includes eight addressing modes.
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Implied Register (IMP)
Certain Op Codes automatically imply register usage, such as the
arithmetic operations that inherently reference the Accumulator, Index
Registers, Stack Pointer, and General Purpose Registers.
Register Direct (REG)
Many Op Codes contain bit fields specifying registers used for operation.
The exact bit field definitions vary depending on instruction depicted in
Figure 75.
Implied Register
Register Direct
Register Indirect
Indexed
Extended
Immediate
Relative
IO