Reading Hennessy's book "Computer Organization and Design" it is mentioned "Register.Rd" and "Register.Rs" but what does it mean? The .Rd, .Rt and .Rs parts I can't understand, on page 365:
Electronic – the meaning of “Register.Rd”
computer-architecturecomputerscpumicroprocessorregister
Related Solutions
I'm not sure how far you want to go with this, but I'm afraid you may become frustrated when you find out how complex your design may become if you want it do something useful, no matter how nice and comprehensive it looked when you started.
Therefore I'm back with the suggestion to your previous question: the FPGA. There are complete so-called "soft processor" designs available free, but you can also build your own, starting from a 2-bit full adder if you want. (And that is what you want if you still have to learn VHDL.) Every FPGA manufacturer has development boards for its products, and there are also third-party boards, with a choice of on-board peripherals, like LEDs, character LCD, buttons, etc.
Yes, actually you have answered your own question. Just to add some comments. In fig. 4.34 you can verify that IM really stands for Instruction Memory (see the caption):
Finally, in figure 4.62, you will find a data path which shows the 5 pipeline stages and labels explicitly the IM block as Intruction Memory and DM as Data Memory.
I hope this helps!
Best Answer
They are just generic ways of referring to cpu registers:
For example, a cpu instruction could be:
add Rs,Rt,RdWhich would mean:
Rd = Rs+RtThe Rd,Rs,Rt are placeholders for the actual registers used in this instruction. A specific example for this instruction could be:
add $1,$2,$3Which would mean "write the sum of specific cpu registers
$1and$2into$3".