UMBC CMSC 313, Computer Organization & Assembly Language, Fall 2003, Section 0101

i386 Assembly Language I

Tuesday 09/09, 2001

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Assigned Reading in Murdocca & Heuring:   

Assigned Reading in Neveln:  3.10-3.13, 4.1-4.8

Assigned:  hw2, proj1

Due:  hw1

Topics Covered:

• Slides are available in PDF: Slides04.pdf
• ASCII, EBCDIC and UNICODE character codes.
• Moore's "Law" and the evolution of the Pentium architecture.
• General purpose registers in the Pentium CPU and their uses.
• i386 addressing modes.
• Using the gdb debugger. (Demo next time.)

Programs shown: The assembly language programs shown in class have the .asm extension. The corresponding file with the .txt extension is usually a transcript with sample runs.

• The "Hello World" program: hello.asm and hello.txt.
• A program that converts the user's input from lower case to upper case: toupper.asm and toupper.txt. (Note: the transcript toupper.txt contains a demo of gdb.)