Xerox 820

[Paxton Hoag]

There was a business in Beaverton who sold a simple board to run both
5 1/4" drives and 8 inch drives on the Xerox 820 at the same time.
Evergreen technology??? Closed about 1990. I seem to remember it
wasn't hard to build.

If anyone comes uiop with the info I would be intersted too as I still
have an 820.

Paxton
Astoria, OR

On 5/12/05, SP <spedraja at ono.com> wrote:
> 
> Hi !
> 
> > I'm relatively sure there is nothing significant in the floppies unit box
> > other than the disk drives and power supply.  In the mid-80's I obtained
> an
> > 820-II motherboard, and simply soldered "D" connector pins onto a floppy
> drive
> > ribon cable, to connect a pair of 8" floppies to the thing, making up
> > my first CP/M computer system.   The 8" drives were cheap and common then,
> > but the ones in the Xerox box and the Xerox cable were not so common.
> 
> I confess my absolute inutility in these matters, but never is too late to
> begin
> the training. Do you mean one complete male D connector or D-Sub ?
> There is some order in the soldering of the pins ?
> 
> I have three or four shugart 8" units but never tried to put them to work.
> Mostly
> cause of the fault of one power supply. If someone knows of the specs
> of one Power supply for these floppy units, I should agree to get it.
> 
> > Both are possible.  If you obtain and attach 8" drives, I can send you a
> > bootable floppy, once I get my system up and running again.  If someone
> > provides more info about 5.25" drives, maybe I'll be able to get them
> > working on my 820-II.  Better yet, maybe someone knows of more modern
> > storage alternatives that could be made to work with these.
> 
> Mmm... I should like to know if one 5'25 unit like the used for the PS/2
> (with 37 pin)
> could work connected to one Xerox 820. It was one 360k unit, I think. And I
> have
> one.
> 
> Another option, if there is no cabling problem, would be to use a couple of
> IBM PC 5.25 floppy units, arranging one ribbon floppy cable in the same that
> you
> used with the 8" inch. I suppose would be easy to use one program to copy
> the "standard" CP/M image available in some websites (prepared for the Xerox
> 820)
> to 5.25 floppies.
> 
> Thanks and Greetings
> Sergio
> 
> 


-- 
Paxton Hoag
Astoria, OR
USA