13 Mar
2013
13 Mar
'13
4:59 a.m.
On Tue, 12 Mar 2013, mc68010 wrote:
On 3/12/2013 5:43 PM, Steven Hirsch wrote:
> On Tue, 12 Mar 2013, mc68010 wrote:
>
>> On 3/11/2013 11:37 AM, Enrico Lazzerini wrote:
>>> Hi, I received a Xerox 820-II mainboard. I've found that does not have a
>>> FDC
>>> on board and that the 37-pin connector used to connect the floppy disk it
>>> seems to have a bus and its own protocol to talk to an external FDC board
>>> outside. Is there anybody who knows more and is it there a way to try to
>>> connect and operate the drive with this mainboard?
>>>
>
>> Having cleaned the heads, about every other disk going through a box of 8"
>> 820 disk, sthere is nothing in the drive other than the drives and a power
>> supply. I am not sure if the 820-II is different but, I doubt it. The
>> cable just splits off to each drive. Everything is on the mainboard.
>
> My 82O-II does indeed have its floppy controller on a daughterboard. I
> suspect this is a different arrangement from the original 820 aka Ferguson
> Bigboard.
I am sure you are right but, I don't see anything
but a power supply with the
floppy drives in this video. Looks identical to the non II floppy units I
had. http://www.youtube.com/watch?v=B9OwwolhLuE
I think we're talking about different cases. The disk controller is
clearly visible in the closeup of the computer itself. It may have been a
different PCB in the floppy vs. hard-disk system.
On a related subject, I would love to get my hands on an 820-II with hard
drive. Had two lined up at different points but both sellers flaked out
and stopped answering e-mail. Wonder if there's some sort of distortion
field projected from these units?
If anybody has one they'd like to part with, I can do cash or trade.
Steve
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