Talk:Design target

From TriPU

Harvard architecture or von Neumann architecture?

For an 8 bit µP with 32 bit instructions, Harvard architecture sounds like a good idea. Ya know, maximum throughput can already be achieved with a pipeline depth of 1! Yup, I know, two seperate address busses, an 8 bit data bus and a 32 bit instruction bus are not exactly what veroboard users love, but everything comes with a price...

--Klaws 20:32, 10 Aug 2005 (CEST)

Re: Harvard architecture or von Neumann architecture?

Interesting point, I never really thought that much about it as I designed a von-neumann architecture form the beginning. It would be a cleaner design in some respects especially forbidding self-modifying code etc. On the other hand I have to evaluate the physical effort (as stated in the diary the first bus will allready take around 60 wires) as well as I would deny stuff like runtime-compiled code. I will have to think about it. Switching between these designs shouldn't be too hard anyway, basically it's splitting some buses and changes to the microcode. Finally remember that although internally TriPU is an 8-Bit µP, the external view is a full-blown 32-Bit architecture with a small bus :)

--TriPhoenix 00:48, 10 Aug 2005 (CEST)