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lec11 - Computer Programming I TA C162 Todays Agenda LC3...

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1 Computer Programming I TA C162 03/02/07 Today’s Agenda  LC-3  Overview Instruction Set Architecture (ISA) Operate Instructions Data Movement Instructions Control Instructions
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2 Computer Programming I TA C162 03/02/07 Instruction Set Architecture ISA  = All of the  programmer-visible  components and operations of the computer Memory organization Address space -- How may locations can be addressed? Addressability -- How many bits per location? Register set How many?  What size?  How are they used? Instruction set Opcodes Data types Addressing modes ISA provides all information needed to write a program in  machine language  
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3 Computer Programming I TA C162 03/02/07 LC-3 Overview: Memory and Registers Memory Address space:  2 16  locations (16-bit addresses) Addressability:  16 bits Registers Temporary storage, accessed in a single machine cycle Accessing memory generally takes longer than a single cycle
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