silly question about 68060 CPU

[Damion]

There are sites all over the net which explain
how to "swap" a 68040 with a 68060.
They are pin compatible (the 'easy' part) but
as has been mentioned the voltages differ, so
in addition to replacing the processor you
must replace the voltage regulator (or by
some means reduce to 3.3v).

If you are brave and have cash to burn you could
also try this:

http://www.emulation.com/catalog/off-the-shelf_solutions/production-test_adapters/upgrade_motorola/

[Damion]

@Karlos:

Thanks for letting me know.

I also forgot to mention that the Phase 5 model is the standard 68060 with FPU and MMU, clocked @ 50Mhz, and the DCE model is a fancy true 60Mhz 68060 clocked at 66Mhz with FPU and MMU, so it's about 16Mhz faster than the Phase 5 model. It is also so cool, that putting a heatsink/fan on it would be a waste of money and time.

Your 60mhz (68060RC60) '060 runs fine at 66mhz
with no fan or heatsink? That's interesting...mine
came from DCE with an obnoxious fan (since
replaced)...it would be nice to ditch the fan
completely if safe.

[Damion]

Ya know they make 80Mhz 060's, right?

Well, there are no "factory" 80mhz chips, but
certain mask revisions are capable of handling
the speed at the cost of longevity.

The later "G65V" mask (MC68060RC50 "A" chips)
are the best canidates for 80mhz, as it seems
the FPU has been slightly modified to reduce
potential errors (as well as MOS11 fab).

Unfortunately, all of the factory 60mhz chips I have
seen (including those with '2002' stamped on them)
are still manufactured with the previous F43G mask
process, and usually crap out at anything above
70mhz.

Motorola makes:

-50 and 60mhz chips with "full" FPU/MMU

-for "embedded" applications, "cut down" 50, 66
and 75mhz chips which lack either FPU, or both
 FPU and MMU.

[Damion]

Yep, it's very cool. Try it out without the heatsink/fan and put your finger on the 68060 after lets say 15-30 minutes of use and see what happens. When I do that I can only feel slight heat, and there's no need to remove my finger at any time as there is with the Phase 5 model which would burn my finger if I leave it on the 68060 for more than lets say 10 seconds. It's weird...some 060 chips run cooler than others.

I would think that your DCE Blizzard 1260 was equipped with heatsink/fan by the dealer, just in case!

Thanks for the info, I'll try it out -carefully- and see
what happens.

[Damion]

As with all overclocking... better to be safe that sorry... get some cooling on that chip!
 

That's good advice. According to my temperature
laser, the '060 @66mhz (60mhz chip) is running
between 29 and 37C (idle/load) WITH a fan,
heatsink and adequate ventilation...so without
it may get too hot (guessing 45-55C or more).
The chip can probably handle it but I'm not
risking it, at least with this particular chip.