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Carrera040 cloning


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Speaking of which, is there an authoritative guide to finding legit CPUs - esp the 68040 non-LC 40mhz ones? Did I see once that they no longer make them hence it’s about finding old ones and avoiding fakes/screen printed variants that are slower or actually LC chipsets?

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Oh that's very, VERY nice Bolle. you always find ways to out-do yourself with yet another amazing example to reverse engineering. I don't know how you do it!

 

Definitely still up for a Cache add-on for my Carrera that's sitting in my IIci.

 

To be honest, money-no-object, I'd really love another complete set to put in my IIvx, but really that would probably be a bit wasted in that and would be nothing more then morbid fun to see the lackluster results.

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13 hours ago, Bolle said:

I am using a MC88916DW80 which is rated at  a maximum of 40/80MHz for the B- and P-clock respectively.

The exact same clock generator (although at a lower speed rating) is also found on some Macintosh logicboards.

I have seen Turbo040s with 35/70MHz and lower 25/50MHz rating as well. All Carreras I have seen so far have used the 40/80MHz version.

 

Well, if you find a use for the slower ones, I have a reel of 998 of the MC88916DW55...

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19 hours ago, demik said:

Thanks ! Looks only simple traces to create a PDS slot.

 

Should be straightforward to replicate

I can provide the schematics of the Micromac IIcx adapter if you want. Got one of those as well.

Also mind you will need the more uncommon socketed IIcx logicboard unless you are ready to desolder the CPU on your logicboard and put a socket in place.

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6 hours ago, Bolle said:

I can provide the schematics of the Micromac IIcx adapter if you want. Got one of those as well.

Also mind you will need the more uncommon socketed IIcx logicboard unless you are ready to desolder the CPU on your logicboard and put a socket in place.

 

Thanks ! I got two IIcx, one socketed, one soldered. The socketed one isn't starting yet (recap done), Don't want to mess with the working one, I will keep your offer in mind.

 

Good job anyway !

Edited by demik
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  • 2 weeks later...
  • Gorgonops changed the title to Carrera040 cloning

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