Emulation of a guest computer architecture on a host system of another computer architecture. Legacy instructions are translated into translated instructions. If the particular legacy instruction is an operand-setting instruction for storing a value of a precedent operand, a corresponding flag is set when the value of the precedent operand has not been determined. If the particular legacy instruction is an operand-using instruction for using the precedent operand, a check is made to determine if the corresponding flag is set.

 
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< Bytecode program interpreter apparatus and method with pre-verification of data type restrictions and object initialization

< System for projecting a handling instruction onto a moving item or parcel

> Method and apparatus for determining availability of a queue to which a program step is issued out of program order

> Methods and computer program products for protecting source code of an interpreted programming language
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