Hardware Hacking Projects for Geeks

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Part I: Basic Hacks, Tools, and Techniques

If you need a reference to the 8051 Instruction Set with details, take a look

here:

ftp://download.intel.com/design/MCS51/applnots/01502a01.pdf

If the 8051 is new to you and you wish to start with a basic tutorial, take

a look here:

http://www.pjrc.com/tech/8051/

Like most things on the Web, these links can change. If you cannot locate them,

simply do a web search at http://www.google.com to find their latest locations.

A Quick Overview of Assembly Language

and C for the Hacked Furby

The hacked Furby can be programmed in C and assembly language. We’ll

step through how to do this now.

If you want to program your newly modified Furby in C, a set of APIs will

allow you to control most of the basic functions of the hacked Furby. The

code for these APIs is at http://www.appspec.net/index.html.

Learning 8051 assembler code

The mlasm51.exe download mentioned earlier is a self-installing executable

for Windows. When you run it, it unpacks the free assembler and an excel-

lent manual, as well as code samples and figures. Print them all out and

read them to learn 8051 assembler. If you have any assembler knowledge,

8051 is not hard; it just takes an investment of time. The CPU does have

one or two architectural curiosities, and is limited by its 8-bit architecture.

On the other hand, those provide some simplifications too. The 8051 in

the ...