Computer Science 220

Assembly Language & Computer Architecture

Fall 2010, Siena College

Agenda

- Announcements
- Lab 4 due Tuesday
- Exam 1 recap
- Digital logic basics
- resistors and transistors
- the inverter
- NOR and NAND
- digital logic gate abstractions
- universality of gates
- representing mathematical functions
- multi-input gates
- simplification of circuits

Lecture Assignment 0b

Due at the start of class, Tuesday, October 19.

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. We will discuss these questions at
the start of class, so no late submissions are accepted.

- We constructed a NAND gate from two transistors in series. What
function of three inputs is obtained by placing three transistors in
series?
- Show that the NOR gate is universal by building circuits to compute NOT, AND, and OR using only NOR gates.