Computer Science 220
Assembly Language & Computer Architecture

Fall 2011, Siena College

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Agenda

• Announcements
• Lab discussion
• Unix Tip of the day: cal (check out 1752!)
• Lecture assignment 0x06 recap
• MIPS Programming
  • subroutines and programs
  • registers and the stack

Lecture Assignment 0x07

Due at the start of class, Tuesday, October 4.

Please submit answers to these questions either as a hard copy (typeset or handwritten are OK) or by email to jteresco AT siena.edu by the start of class. Please use a clear subject line when submitting by email (e.g., CS 220 Lecture Assignment 0x07, Joe Student). We will discuss these questions at the start of class, so no late submissions are accepted.

1. COD Exercise 2.4, parts 1, 2, and 3, both a and b, p. 182. (3 points)
2. COD Exercise 2.12, parts 1 and 2, both a and b, p. 190. (2 points)
3. COD Exercise 2.16, parts 1 and 2, both a and b, p. 194. (2 points)
4. COD Exercies 2.25, parts 1, 2, and 3, a only, p. 204. (3 points)

   Recall the following when answering 2.25:

   • beq and bne add an amount equal to the 16-bit constant specified in the instruction followed by 2 0 bits to the current program counter to get the address of the next instruction.
   • j replaced the bottom 28 bits of the program counter with the 26-bit address specified in the instruction followed by 2 0's to get the address of the next instruction.