On Sunday, March 9, 2003, Tony Duell wrote:
To do: My only
existing cable that plugs into a DL11-W is for 20mA
current loop. I have a current loop VT52 that I haven't yet tested. I'll
see if I can do that tomorrow. After all, it would be nice to know if the
register printout is actually occurring.
It's also not hard to make up the RS232 cable. I've done it many times.
Let me know if you want to do this and need pinouts, etc.
Yes, very easy. But I do have a lonely current loop VT52 that (if it works)
desparately wants *something* to send it some bits and bytes to display. How
can I turn down a request like that? :-)
Maybe I'll build a RS-232 cable for the short term so I can test the machine
with a known good console terminal.
I don't know what test gear you have
Sadly, all I have is one digital multimeter. It's an eBay cheapo special --
not the bottom of the barrel, but darn close to it. Oh, I also have a
Heathkit digital IC tester model IT-7400 that I swiped from a professor's
trash pile back in my college days (i.e. 4 months ago). It works.
I want to get an oscilloscope soon. I've got other things I need to spend my
salary on at the moment, but that might not be too much of a hindrance. My
current plan is to put a relatively large portion of my collection (which
isn't that large) up for trade and hope for a suitable scope in return. Or
maybe I'll sell some of it on eBay and use those proceeds to buy a scope on
eBay. About the best thing I have is a MINC-11 (when it rains it pours,
eh?), but there are also various PDP-11 parts, two HP-85s, a couple of
TRS-80s (M3 and M4), some IBM 5150 PCs, an AT&T 3B2/EXP, a bunch of Sun3s,
and some other stuff I can't remember. Sometime soon I'll make a more
detailed inventory, take pictures, and formally announce it. I figure all of
that stuff combined should (at least) net me one good scope or logic
analyzer.
--
Jeffrey Sharp