CS107e Spring 2026

CS107e is Computer Systems from the Ground Up. Read more about the course and review answers to common questions from prospective students and enrollment information.

When and where

(discussion forum)

(RISC-V simulator)

RISC-V cheatsheet

D1-H User manual

Mango Pi pinout

Compiler Explorer

This week in CS107e

Week 4
Lecture Mon 4/20	Modules, Libraries, and Linking ( slides, code ) Start sequence, build process, makefiles, linking, libraries, module design. Readings: Our guide to binutils Anatomy of a simple linker script example from ld documentation Longer tutorial on bare-metal RISC-V build, thanks to Lucas Fryzek Go deeper: David Welch's very thorough articles on baremetal programming and bss data.
Lab/assign	Lab 3: Debugging and Testing ( writeup ) Prelab to prep before lab.	Assignment 3: String Formatting
Lecture Fri 4/24	Memory Management ( ) Stack allocation: stack frames, local variables, backtrace. Dynamic allocation: implementing a heap allocator. Runtime detection of memory errors. Readings: Read our overview of stack frames Review dynamic memory allocation (`malloc`/`free` in C) and the operation of the heap (K&R 5.6-5.9 or Essential C Section 6). Compare and contrast stack versus heap allocation. Why do we need both?

See schedule for entire quarter.

Meet the team

Aditri

Ashley

Daniel

Elias

Frances

Joe

Julie

Nifemi