I have installed ubuntu hoary (based on debian amd64) and works quite well (minus the flash plugin)
Simulators are developed for mips or alpha , can be a way to test debian.
Is true pearpc didn't quite worked with booting
ubuntu powerpc on my machine
I like to play with various machines (power, alpha ,mips) . There is always something to learn from porting software on them .
Heck there are vax simulators (ultimate CISC) - don't know how linux is working on that ;)
VAX Assembly looks interesting almost like C
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