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

[Tom Uban]

It appears that mine is an original 820. I need to look inside to see if it has the double density
upgrade.
I may take you up on your offer at some point.

--tom

On 8/11/21 9:42 AM, Jonathan Chapman wrote:
> 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