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Computer Architecture

Computer Architecture. Microsoft Assembler. Procedures. Internal External Speeds learning Importing .code extrn Clrf:proc, Readstring:proc main proc. Cont.. procedures. Calling call Readstring call Readint Initialization What do you ask ?. Cont.. procedures. Which registers?

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Computer Architecture

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  1. Computer Architecture Microsoft Assembler

  2. Procedures • Internal • External • Speeds learning • Importing .code extrn Clrf:proc, Readstring:proc main proc

  3. Cont.. procedures • Calling call Readstring call Readint • Initialization • What do you ask ?

  4. Cont.. procedures • Which registers? • Reg sizes = var sizes? • Data saved?

  5. “if” • Compare 2 objects • 2 outcomes cmp ax, bx cmp ax, 97

  6. “hop-a-long” • Goto • Jump to labels jmp looplabel • Conditional jumps • a jump that needs a condition • condition …cmp statement • “fall through”

  7. Conditional Statements Explain! mov ax, 5 mov bx, 7 cmp ax, bx jg lessthan jmp greaterthan

  8. Practical Assignment • Plan! • Use the skeleton program (1st prac) • Cut relevant code from 2nd prac eg.

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