18 Jun
2013
18 Jun
'13
2:17 p.m.
> I was luckier,
> I succeeded in getting ink onto paper with my first serial printer
> (DTC-300 Hytype 1) connected to TRS80 Model 1 after about 5 weeks.
On Tue, 18
Jun 2013, Tony Duell wrote:
I mustt be incredibly lucky. The first serial printer
I tired to use with
a Model 1 was a Danders 12/7 and I got that printign withing 3 hours of
owning it. And at least some of that time was spent walikign to/from
H.Gee's (the electrronics shop in Cambridge) to buy a couple of DB25 plugs
and some cable.
But, you probably knew what you were doing.
OTOH, I had a guy working for me who started with NO hardware experience.
He had taken two of my beginning programming classes, and decided that
THAT was what he wanted to do with his life, so he begged me to let him
work unpaid. After a probationary period, I made him Vice President.
On his first attempt, he reached into one of my bins of cables, and tried
the first one that had the right gender on each end. It turned out to
have exactly the right lines crossed and worked.
I know I'm atypical, but I have never had any
major problems with RS232
interfaces. Perhaps it's becuase I sit down with the manuals (and
scheamtics) and work out what should be conencted to what. And then use
various test instruments (breakout box, lien monitor, 'scope) if things
don't work rather than just making random changes and hoping.
You had schematics??!?
My first attempt was with the mimeographed "preliminary" docs for the
Radio Shack Serial interface add-on card. and no Google.
--
Grumpy Ol' Fred cisin at xenosoft.com