19 Jul
2014
19 Jul
'14
3:26 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Paul Berger
Sent: 18 July 2014 22:38
To: cctech at classiccmp.org
Subject: Re: PDP8 Omnibus to usb interface
On 2014-07-18 4:58 PM, Robert Jarratt wrote:
I am pretty sure the SBC6120 would be of interest at
DEC Legacy. There
are people who bring "real" PDP8s as well, but not everyone can have
one of those, so an SBC6120 is certainly going to interest people. I
would like to see it at the next Manchester meeting.
How easy is it to get an SBC6120?
Regards
Rob
The SBC6120 was produced by Spare Time Gizmos and he sold all his kits
however all
the documentation and code is available on his site.
However the Gerber files are not the latest and there are known errors in
the boards they would produce so you can't easily reproduce the system as
sold, even if you could source all the components. Some folks have wire
wrapped a board but that seems a thankless task. The last set of boards were
not even sold outside the USA, and like me Paul is in the UK. Mine came from
Switzerland which was a worry but I don't have a front panel ....
I think rather than try and reproduce the system as designed I would make a
larger board and perhaps include the VT100 stuff from the IOB6120 io
expansion card and/or the front panel from the FP6120 front panel card.
However the IOB6120 has an FPGA you have an FPGA then why use the HD6120...
Just build the entire PDP-8 on a NEXYS-3 board....
Dave
G4UGM