CS 220 Course Materials

General

Spim handout for the final. (You don't need to print it --- you'll receive a "nice" copy at the final.)
Syllabus.
Using telnet to reach phoenix.
Using the SAL Simulator.
In-Class Lab 1.
Homework and Class Policy.
Sort in SAL.
postfix.cc, a postfix calculator in C++.
News about the Intel Pentium "F0" bug. The fix, from Intel.
Secret Assembler Mnemonics
SPIM S20: A MIPS R2000 Simulator. Abbreviated version; all you really need. A nicely formatted version will be distributed in class.
SPIM S20: A MIPS R2000 Simulator. Full version; very long.
Even more on SPIM.
echo.spim example.
addn.spim example.
Running xspim.
MIPS call/return examples: factorial.cc. factorial.spim.
postfix.hints. SPIM code for some of the postfix.cc routines and an example main routine. The SPIM code is available in the file ~kelliher/pub/cs220/postfix.spim on phoenix.
testStack.spim. SPIM code for testing the stack functions. The SPIM code is available in the file ~kelliher/pub/cs220/testStack.spim. New and improved: now tests the save/restore of the Sx registers.
Testing Your SPIM Stack Routines.
Postfix Calculator Tests.

Homework 1, due Sept. 26.
Homework 3, due Oct. 17.
Homework 4, due Nov. 3. Checking your SAL program. Hint: you will eventually encounter arithmetic overflows on adds, resulting in erroneous results. Use the addu rather than the add instruction to correct the problem. (addu is an unsigned add, which doesn't generate overflow.) The overflow occurs as a result of the signed addition of positive operands producing a negative sum.
Homework 5, due Nov. 17.
Postfix Project, due Dec. 10. Note: don't write the null character as '\0' in SPIM; instead use 0. The outline for Dec. 3 does not contain the isspace function, but both postfix.hints and postfix.spim now do.

Last updated May 26, 2021.

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