Tracy R Reed wrote:
Paul G. Allen wrote:
When I worked for Loral at the FASWP base (part of the old Naval
Training Center that has been closed for years and re-developed), the
fleet trainer I worked on was a mainly mixture of Relay Transistor
Logic (RTL)
What is relay transistor logic? Google turns up no hits for this
particular term. I've heard of RTL and TTL and DTL etc. But those all
involve actual transistors in various arrangements with other
components. Do you just mean using relays as logic elements?
Sorry, what I meant to write was:
...I worked on was mainly a mixture of Relay Logic, Diode Transistor
Logic (DTL), Resistor Transistor Logic (RTL), and some discrete
Transistor Transistor Logic (TTL).
Yes, it used relays to build logic elements. One card with multiple
relays might be one NAND gate for example.
I was thinking ahead about RTL when I wrote the first part of the
sentence and didn't even proof read the damn thing before hitting Send.
/me slaps himself upside the head many times.
Suffice it to say there were a lot of relays in the system, many volumes
of schematics, and troubleshooting was always a challenge. The original
system clock was called the commutator because that's what it was: A
60Hz motor with a ton of contacts on it that created square pulses at
different rates (they varied in frequency and width) that were used to
control the entire system. It was replaced by a more "modern" solid
state clock that took an entire rack with many cards with many different
tuning pots, switches, etc. Fun stuff.
PGA
--
Paul G. Allen, BSIT/SE
Owner, Sr. Engineer
Random Logic Consulting Services
www.randomlogic.com
--
[email protected]
http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-lpsg
