Xerox 820/II 8/16 Prom/Eproms ( Masters ) on e-bay

[Jonathan Chapman]

There are guides online, the differences are documented, I believe you can tell from the outside. Bezel color is not always a 100% indicator.

Floppies are at least easy for them! If no one else can do it, ping me and I can run off a set.

Thanks,
Jonathan

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On Wednesday, August 11th, 2021 at 10:37, Tom Uban via cctalk <cctalk at classiccmp.org> wrote:

> I have a Xerox 820. I don't know how to tell if it is a -II or not. It is marked as U05-013264
>
> September 1984. It powers on and boots the monitor. Looking at the PROMs, they are labeled:
>
> U33 5.0, U34 5.0, U35 5.0, U36 5.0, U37 4.01, U38 4.01
>
> At some point, I need to ask someone to make me bootable 8" floppies, but I suppose I need to
>
> determine if it is 820 or 820-II first...
>
> At least some of the ROMs appear to be available here (along with other info):
>
> http://bitsavers.org/pdf/xerox/820-II/firmware/
>
> --tom
>
> On 8/11/21 9:04 AM, Mark G Thomas via cctalk wrote:
>
> > Hi,
> >
> > I'm not prepared to lay out $200 for these Xerox ROMs, but if I do manage
> >
> > to get them, I'll read and share them. I did not know there were 5.0 ROMs
> >
> > for the 820-II, but it appears there were, and they are included.
> >
> >         https://www.ebay.com/itm/184980603844
> >
> >
> > Mark