A500T project! - what ive done this weekend : )

[pyrre]

4x 50mhz 030's giving you a wopping 200mhz

How are you planning on doing that?

[SamOS39]

dont know but i can set myself goals cant i ..?
ill find a way ..   :-)

[pyrre]

yea... goals are sure nice to have...
But four CPUs do not add up to 4 times the mhz. unless you find some way for the os to split the task 4 ways and run it parallel trough the four cpus.
If i am not wrong the amiga os do not even support multi cpus (of same type i.e. two or four 060s...)

[SamOS39]

what about connecting them in a chain on one board

wont the amiga treat it as one super fast CPU ..?

[pyrre]

I am not a hardware wizz... but i seriously doubt it...
If you put it in serial you will run the same task/process four times. and thus reduce performance. In parallel amiga os (i guess) would see only one cpu and crash when four cpus tries to do the same thing...
However separating them on the fsb and giving them a separate cpu bus may work
But still the os has to support multi cpus at first.
And i don't think amiga os is capable of doing so....

[Piru]

@pyrre

You realize he was just joking, right? ;-)

[countzero]

SamOS39 wrote:
what about connecting them in a chain on one board

wont the amiga treat it as one super fast CPU ..?

Of course, no.

68k was not designed with multiprocessor architecture in mind. You can't do it unless you design a really heavy logic system which does task management between processors and a new exec which handles this hardware on the OS side.

see 88000, a RISC based CPU from motorola which can be used in a multiprocessor architecture.

http://en.wikipedia.org/wiki/Motorola_88000

[A6000]

I think applications must be specially coded to use multiple processors, if you just want to "try it out" you could network 3 or more A500's using their serial ports and a program called sernet or parnet using parallel ports, then split your application between all your computers.

[pyrre]

@ Piru

No, not really....  :-D

[Iggy_Drougge]

68k was not designed with multiprocessor architecture in mind. You can't do it unless you design a really heavy logic system which does task management between processors and a new exec which handles this hardware on the OS side.

There was a Swedish company, DIAB, that built multi-processor 68k UNIX systems. I think their last one had 4 x 68040.

[Piru]

@pyrre

Apparently he wasn't... :-)

[Trev]

Now everyone's going to want one. And while we're dreaming, how about a hardware hypervisor with a pluggable instruction translator? Actually, if one can make a CPU expansion, why not a lightweight hypervisor? Can't context switch the custom chips, though, so I guess in the end you'd end up with a Minimig-thing capable of hosting multiple instances of the kernel. (Has anyone tried that in software with an MMU-based system?)

[redrumloa]

Seeing this A500T project and then this C64T project, has given me the itch..

Coming soon.. The Ultimate Commodore 128 Tower Project!  :-o Yes, the computer in my tag-line will be converted into a tower! :-D

[rkauer]

SamOS39 wrote:
cheers!

oh yes and i need to make (or buy) a keyboard interface  
THEN i can start work on the prototype of the new bus expansion board with 4x 50mhz 030's giving you a wopping 200mhz, ram expansion, ide interface, zorro2/isa/pci slots :insane:

 If you have enough talent, use the original keyboard in the original case as a keyboard only.

 You just need to use 6 wires to route the +5V, GND, keyb_data, Keyb_clock and the two LEDs.

_________________________________________

 Or use an original keyboard from an A2000/3000/4000. Note you loose the LEDs.