Data Sheets for parts? what is the distinction between: Register, ARegister, DRegister

[MarinaP]

Is there a Data Sheets for parts?  

Looking at "Figure A.6 All the built-in chips supplied"

I cannot see a distinction, other than the name, for: Register, ARegister, and DRegister

Edit:  I see that Register has no GUI on the HW simulator, but that both ARegister and DRegister do have.  

[WBahn]

Register is simply a generic register.

ARegister and DRegister are specific registers in the CPU implementation that have GUI components so that the emulators can show you their contents on the screen.

[MarinaP]

Thanks very much for your reply.  
It seems they have the exact same function then?  Just a different name?  I used them as expected but I was wondering if they are otherwise the same part.  

-M  

[ivant]

MarinaP wrote

Thanks very much for your reply.  
It seems they have the exact same function then?  Just a different name?  I used them as expected but I was wondering if they are otherwise the same part.  

-M

Yes, the have the same function. The hardware simulator treats ARegister and DRegister a bit specially: it shows them in the UI.