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Addressing modes for the Pep8 computer
Updated Nov 27, 2009 by Stan.War...@gmail.com

Addressing Mode aaa-field Letters Operand
Immediate 000 i OprndSpec
Direct 001 d Mem (OprndSpec)
Indirect 010 n Mem (Mem (OprndSpec))
Stack-relative 011 s Mem (SP + OprndSpec)
Stack-relative deferred 100 sf Mem (Mem (SP + OprndSpec))
Indexed 101 x Mem (OprndSpec + X )
Stack-indexed 110 sx Mem (SP + OprndSpec + X )
Stack-indexed deferred 111 sxf Mem ( Mem (SP + OprndSpec ) + X )

Addressing Mode a-field Letters Operand
Immediate 0 i OprndSpec
Indexed 1 x Mem (OprndSpec + X )


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