This appeared on the dragonuser site - looks like a very interesting
machine. He's based in Wiltshire but does travel around a bit if anyones
able to help with basic faultfinding .
By the way Jules - Dragon diagrams are available from the Dragonuser group.
Geoff.
P.S. Had a good dig around in the front part of the loft but no Nascom yet ,
although I did find my two Nascom Imp Printers - chassis only , bought a
long time after Nascom ceased to exist.
----- Original Message -----
From: "Richard" <richard.harding_at_virgin.net>
To: <dragonuser_at_yahoogroups.com>
Sent: Sunday, July 11, 2004 1:37 PM
Subject: [dragonuser] Help with Dragon *Beta* Main Board
Hi all,
I have come into possession of a Dragon Data Beta (aka. The ?2500
business machine) prototype main board. The sad news is that
appears to be dead. Is there anyone out there who could possibly
help in getting this beastie back into life?? (If it ever worked)
Serious reverse engineering and electronic skills required! I've
had a poke about with an oscilloscope and it is clocking OK and
there is life on the data buses.
I have uploaded a few pics into the photos section.
For those interested it appears to have the following features:
? 256 K RAM
? Twin 6809E's clocked at 1.8Mhz
? Onboard Floppy controller (3.5" Single sided drives)
? Onboard RS232
? Optical interface
? External Keyboard (no keyboard L )
? Unkown DIN connector - Mouse? Light Pen??
? No built in Drag 64 mode! Only an OS-9 boot ROM (ROM dumps
available).
Simon Hardy is also holding (most of) a Dragon Data Alpha (aka
Professional) prototype for me. More info on this in the coming
months when we can actually get a power supply attached.
BFN
Richard
www.dragondata.co.uk
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Received on Mon Jul 19 2004 - 15:21:25 BST