Daystar 68030/68882 50 mhz

[jjans]

Daystar

Figure these chips would work in an Amiga? I mean they are the same chips as Motorola (68k) are they not?

Be nice to through them into my A530T...

[jjans]

Thanks,

I really only require the FPU, as I don't think I can use the CPU. My A530 has a 68030E, that does not include some memory management instructions that are in a real 68030. My A530 has on board circuitry to replace the MMU functions not included with this CPU.

[jjans]

OK I won the chips, and am awaiting their arrival. The FPU will be no problem from what I understand. I did some digging around, and found I can disable the onboard circuitry for MMU, if the MC68E030 is replaced with a real MC68030. So far so good.

The original CPU is a 40MHZ. (5 volts)

The Daystar is 50 MHZ.       (also 5 volts).

Figure I'll fry anything if I try it?
Should I consider more cooling?
Is the performance increase worth the risk?

[jjans]

[/quote]
Clockspeed is determined by a oscillator isn´t it?
So if you just replace the 030 the 50mhz 030 will just run at 40Mhz, if you want to run it at 50Mhz you will also have to swap the oscillator.

So try the new 030 in the A530 and see if it runs at 40 or 50MHz. If you need to swap the oscillator to reach 50Mhz ask again as it probably invovles soldering, maybe one of the real overclockers can answer it.[/quote]

I see. Thanks for the info! 40 MHZ is fine with me, but it would be nice to take advantage of all the original instructions included on a real MC680830.

[jjans]

jjans wrote:

Clockspeed is determined by a oscillator isn´t it?
So if you just replace the 030 the 50mhz 030 will just run at 40Mhz, if you want to run it at 50Mhz you will also have to swap the oscillator.

So try the new 030 in the A530 and see if it runs at 40 or 50MHz. If you need to swap the oscillator to reach 50Mhz ask again as it probably invovles soldering, maybe one of the real overclockers can answer it.[/quote]
[/quote]

I finally recieved the Daystar package today and I installed both the CPU and the FPU. They both work. The CPU benchmarked at 40 MHZ, and now I have MMU as well.

[jjans]

Brian wrote:
As your CPU is also made to run at 50Mhz it should be safe to try run it at 50Mhz. Just desolder the original oscillator and add a "oscillator holder" and try it at 50 or even 55Mhz...

Interesting. I certainly see the improvement in performance using the FPU by means of a small test program calling 68881 that I wrote with SASC.  

I wonder how difficult it is to find a 50MHZ Oscillator w/holder these days? Do you think the improvement in performance of running at 50 MHZ would be noticeable, say during a compile?

Not that it matters, as now you have me hooked, and will not rest until I actually see for myself...

As for the PCB, the CPU and FPU's were indeed socketed.

Thanks for the input guys!