[rescue] Sun 3/60

[Dan Moisa]

The mmu is entirely in PAL chips and some common ram. Nothing weird, just
specific part numbers that folks report are important to keep the same
original speed rating for. A bunch of timing dependent flows

I have all the part numbers, quantities and datasheets in a Google
spreadsheet, I'll link when I'm at home.

On Sun, Nov 12, 2023, 11:00 Romain Dolbeau <romain at dolbeau.org> wrote:

> Le dim. 12 nov. 2023 à 19:41, Dan Moisa <dmoisa at gmail.com> a écrit :
> > Will try to throw onto GitHub esp now with more ppl. Hopefully there's
> something usable in there
>
> Thanks, that would certainly be useful to others!
>
> I haven't looked in detail at the schematic, do you remember any
> 'weird' custom chips?
> Along the 68020/68881 the 3/60 uses a "Sun-style" MMU [1], but I've no
> idea whether that's implemented in a full-custom chip, in some gate
> array design, or if it's a bunch of discrete components.
> That's one of the issues when people restore old Macs of a similar
> vintage - there's a handful of custom chips that aren't easy to
> replace.
>
> Cordially,
>
> Romain
>
> [1] the architecture manual for sun3 has some details:
> <
> http://bitsavers.trailing-edge.com/pdf/sun/sun3/Sun-3_Architecture_Manual_Ver_2.0_May85.pdf
> >
>
> --
> Romain Dolbeau
>
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