Class Assignment 1

1. Get a CIRT UNIX account (on the AIX machines)
2. Practice using UNIX commands found at:
3.  http://www.unm.edu/~cs151/ingber/oldrefs/unix.html
4. Send storm@cs.unm.edu an email from THAT account
1. This email should include your name, what your major is, why you are taking the course, and other interesting information that you should choose to include.
2. Those of you who have already sent them, I will respond as I get time.
5. Read Chapters 1 and 2.

Computer Systems

What is a computer? (hardware)

• CPU
• RAM
• DISK(s)

Computer Systems

What is a computer? (hardware)

• CPU
• Hz (THz, GHz, MHz, KHz)
• FlOPS?   (TFlOPS, GFlOPS, MFlOPS)
• MIPS?

Computer Systems

What is a computer? (hardware)

• RAM
• DISK(s)
• Bytes
• KB, MB, GB, TB, PB
• Bits
• Kb, Mb, Gb, Tb, Pb

Computer Systems

Bits and Bytes

• 8 bits is a byte
• The basic structure of a computer
• powers of 2

Computer Systems

What we are using:

• CIRT
• AIX (UNIX)

Computer Systems

What we are using:

• CIRT
• AIX (UNIX)

Shameless plug...

GET AN ACCOUNT!!

Computer Systems

Operating System Fundamentals

• File System
• Memory Structure

File Systems

Files
Types
• Executable
• Readable
• Writable
• Directories
• Special

Memory Structure

Everything resides in "Memory"

Memory usage
Variable Types/Sizes

Memory Structure

Everything resides in "Memory"

Variable Types/Sizes

• double = 8 bytes
• int        = 4 bytes
• short    = 2 bytes
• char     = 1 byte

Memory Structure

All objects use memory

Your programs are simply a special case of this

Line-by-Line execution

• easy debugging
• testing