CPU from 7400

Hello
I found one interesting thing: A CPU made entirely from 7400 logic chips. I found it very interesting so I started searching articles about it but found none of them.
Home-Built TTL CPU this is the example and I want to read how does it works I am very very interested.
Can any one give any article about it? the circuit of simple CPU, made from gates and etc. More than others, I'm interested in Instruction Decoder part. any suggestions?

he said he read: Build your own Z80 computer: design ... - Google Books

which seems to have a ton of info

thanks, thats exactly what I wanted!

no problem...

After examination I found out that it's not exactly what I wanted, it's near, but not exactly the one. here arent described the circuits and principles of the parts of CPU (ALU, Instruction Decoders, Registers, Buses, IO Ports, Program memory and so on). I want exactly the circuits of them, how the opcode is decoded and executed, how is written in RAM, or read from, how are bytes being sent from ALU to registers or vice versa and so on..,
AtomSoft thanks anyway xD