[rescue] Sun 3/60

[Romain Dolbeau]

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