débogage - simulateur de débogueur/assembleur/machine personnalisable - Stack Overflow

I'm looking for an integrated assembler/debugger/machine simulator with a fully customizable assembly language for teaching purposes. I'd also settle for some nice looking simulator with source code so I could adapt it to my needs. Can't seem to google anything useful. Thanks!

SPIM is fairly good and free. Not sure about the customizable part though.

I suggest you OVPsim, it's free for non-commercial use and have very neat API, so you can create your own processor families or even platforms.
You can see sources for different platform emulation here. And find a help on processor developing here.

I'm looking for an integrated assembler/debugger/machine simulator with a fully customizable assembly language for teaching purposes. I'd also settle for some nice looking simulator with source code so I could adapt it to my needs. Can't seem to google anything useful. Thanks!

SPIM is fairly good and free. Not sure about the customizable part though.

I suggest you OVPsim, it's free for non-commercial use and have very neat API, so you can create your own processor families or even platforms.
You can see sources for different platform emulation here. And find a help on processor developing here.

Source