[vcf-midatlantic] Bernoulli Drives needed in working condition
mcguire at neurotica.com
Tue May 18 15:06:04 UTC 2021
On 5/18/21 10:57 AM, Ethan O'Toole via vcf-midatlantic wrote:
> There are a number of Bernoulli cards on feeBay. I remember the drives,
> but when I used them they were 44mb and SCSI as I recall.
> Looks like a DB-37 cable is used as well.
> Also, some of the boards on eBay have an EPROM (boot?), some don't. Some
> are missing a bunch of chips including what might be a pal/gal.
> Lots of different versions but most seem to have DB-37.
Those are the earlier ones, 8" disks 10MB and 20MB. Looking at that
board on eBay the memories are starting to come back. ;) There are a
few different interfaces; the one you referenced above is the better
one, with some buffering. Any of them should work I think. I remember
that I used several different models on the 8" drives over the years.
Incidentally, I currently use a pair of 44MB SCSI Bernoulli drives on
my personal PDP-11/34 (here at home, not at LSSM) interfaced via a
Unibus SCSI host adapter. I run RT-11, RSTS/E, and RSX-11M that way.
Works a treat, and it's very handy for healing the soul when something
stresses me out.
Dave McGuire, AK4HZ
New Kensington, PA
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