26 Aug
2007
26 Aug
'07
1:53 p.m.
On Sunday 26 August 2007 16:35, Sellam Ismail wrote:
Speaking of which, I'm remembering running into current loops in some early
hardware (tht Heathkit H-11 I built back in 1978 for one example), but they
seem to be all but gone, even though you can run a whole lot more wire with
one of those than with rs232. Wonder why that is?
I guess they were put into use originally because of teletype machines?
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
IIRC, some of
the communication adapters if plugged in (serial¶llel
D plugs) may cause the unit to appear hung.
Interesting. But nothing is plugged into those. Interestingly, the
serial interface is current loop, for interfacing to a TTY. That feature
really dates these things :)