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as understands the following addressing modes for the Z8000:
rn
Register direct
@rn
Indirect register
addr
Direct: the 16 bit or 24 bit address (depending on whether the assembler is in segmented or unsegmented mode) of the operand is in the instruction.
address(rn)
Indexed: the 16 or 24 bit address is added to the 16 bit register to produce the final address in memory of the operand.
rn(#imm)
Base Address: the 16 or 24 bit register is added to the 16 bit sign extended immediate displacement to produce the final address in memory of the operand.
rn(rm)
Base Index: the 16 or 24 bit register rn is added to the sign extended 16 bit index register rm to produce the final address in memory of the operand.
#xx
Immediate data xx.
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