Starting an emulator!

Hello guys!
I would like to request a lil guidance.I don't know how emulators work(their architecture), so I don't know where to begin the coding and what to do with the opcodes.I know I should begin with 8 chip and thats what I want!I have a not so strong c++ and DirectX basis but I have lots of references, and in the maths part I'm sure I'd have no problems.So all I ask is, a handy guide please .Maybe not a step-by-step but I'd like to know for instance what are the basic functions of the emu in pseudo-code, then I'd have something to work on and I'd like to know the opcodes, their funcions, etc.Im fascinated by those great works of art and I'd be proud to one day work on a big emu project.
And I have checked those sites posted but I was looking for something more detailed...
Thanks in advance!
Marcelo Apsan.

Hmm thanks, I didn't see that one!
And sorry if a request like that has already been posted..

Hehe thanks blueshogun!btw isn't this an e-book?152 pages I'm eager to read them all.I mean, aren't we breaking the law by downloading this?lol