Z8S180 Zilog., Z8S180 Datasheet - Page 195

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

180
UM005001-ZMP0400
Z 8018x Fam il y
M PU Us e r M anual
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