Advice on 68060 purchase wanted

[Damion]

Quite a bit can be found with a basic search at the freescale site. There's also a decent general overview at Rudolphe's site (linked to above).

[alexh]

If you or Franko can find some references that lists each mask by features it could prove very useful.

It doesn't work that way.

The only thing really changes between mask sets are geometry and bug fixes. The lower the geometry usually the less heat the part produces for the same clock speed and voltage and thus the easier it overclocks.

0.60um 1F43G Mask Product information
0.60um G65V
0.42um LC/EC G59Y
0.42um 1E41J
0.32um 71E41J

I think what you want to know is how the product code listing works?? The MC, XC, LC, EC, RC, FE, A etc. works??

http://www.motorola.com.cn/semiconductors/mcudsp/forms/selector_guide/sg186_Std_Embedded_Controller_rev9.pdf

Right now the only one you've mentioned that I can be sure has an FPU and MMU is the MC68060RC50 E41J.

That is your best candidate for overclocking but it is not the only one. If it doesn't have EC or LC in the name then it has both FPU and MMU

But I'd also like some info on RC60, RC66, and RC75 masks.

Doesn't work that way. MC68060RC50, MC68060RC60, MC68EC060RC66 and MC68LC060RC75 *may* all be the same mask set. (i.e. the same chip) but they are badged differently because they have faults in the MMU or FPU which prevent them running at the quoted speed (or at all). If you follow the 68060 though you can see that some EC/LC chips are made with G59Y mask which physically have no FPU

[Iggy]

That has been the most helpful response. I remember receiving XC labeled components from Motorola during sampling and in early production.

[nicholas]

Thanks for that info Alex, it's very useful!

[Iggy]

OK, so the cheap Chinese RC50 and RC60 components on Ebay are 0.60um XC components.
And I assume ideally I'd want a non EC RC60 with a 0.32um 71E41J mask.

[Franko]

This site contains a lot of good data/specs about the MC68K range...

(Still haven't got the address for the other one yet cos my ruddy iMac still installing... )

MC68K Processor Data/Specs

[alexh]

And I assume ideally I'd want a non EC RC60 with a 0.32um 71E41J mask.

Or a non EC RC50 as they will probably be cheaper.

They are exactly the same chip inside. Just one has been selected (possibly on die characteristics) to be marked as RC60.

However E41J RC50's are proven to overclock easily to 90MHz so running at 60MHz will be no problem.