[TUHS] Release of 8th, 9th and 10th Editions Unix

Warner Losh imp at bsdimp.com
Thu Mar 30 13:17:34 AEST 2017


On Wed, Mar 29, 2017 at 3:38 AM, Joerg Schilling <schily at schily.net> wrote:
> George Ross <gdmr at inf.ed.ac.uk> wrote:
>
>> > I think that the 3/50 was a "single board" VME system... and as you say
>> > you really couldn't add anything to it.
>>
>> IIRC the only way to add anything to it was to pull the processor from its
>> socket, plug in a daughterboard, and then plug the processor back into that.
>> It did feel a whole lot more responsive with that extra 8MB of memory!
>
> The method to "upgrade" a Sun-3/50 was to pull the gate arrays and add a
> doughter board. There have been such extensions from "Sunflower". A company
> that was latrer forced by Sun to rename into "Solflower".

I know people that did unnatural things to upgrade the Sun 3/50 to
something that had enough memory not to suck. Oh, and to have real
disks, rather than the crazy SCSI to ESDI disks that had performance
only marginally better than floppy drives....   IIRC, the hard part
was getting a VME "cage" to allow other cards to in inserted, which
killed the pizza-box implementation of the 3/50. But it's been a long
time since that happened, and maybe I'm misremembering. Maybe that was
only possible with the 3/60.

Warner


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