At 08:20 AM 8/30/2004, you wrote:
> > I don't think it would have worked,
> > at least with unmodified DEC hardware I was familiar with, but YMMV.
> >
> > You might dial up the baud rate on the terminal side,
> > but the computer side baud rate was usually fixed with solder jumpers.
>
>Actually, it probably would have worked, as a common (although not required)
>setup for HP terminals was that the serial interface in the host was set for
>external baud rate, and the terminal provided the clocking. So while I can't
>go from experience because I don't have a 264X terminal yet, I suspect it
>would work.
I was thinking of the DEC terminals like the VT52.
But something was nagging at me and I went and looked at the prints.
The DEC DLV11-J, a 4 port unbuffered SLU had a clock I/O pin on it's Berg
connector.
It could output the 16x internal baud clock on that pin to drive a terminal,
or accept a 16x external clock from a terminal, for each UART.
I don't know that any DEC terminals had an external baud generator however.
But if they did, they could have driven the DLV11-J as you say the HP
systems worked.
I've wired a zillion DEC terminals and berg connectors only using 3 wires
(tx, rx, ground).
Sent the entire Matanuska Electric Co-op (Alaska) database from a Datapoint
system to an 11/70 over 1 wire.
(yup, no handshaking - blow and go)
http://www.macro-inc.com/MatanuskaConnection300.jpg
Ed
Received on Mon Aug 30 2004 - 08:03:17 BST
