Pronouncing acronyms (was Re: DEC acronyms)

[Tony Duell]

> 
> 
> 1. I once nearly took a job with them
> 2. I thought they were called Ball as opposed to Balls.

You are probslby right...

> 3. I have several of the Ball VT100 boards referred to but lack a =
> circuit
> diagram to fix them. It would be a Ball diagram as opposed to a DEC one.
> 
> 4. No, the circuit is not in any of the DEC VT100 manuals.

Hang on a second...I know from your positings here that you are 
clueful.... And the VT100 video board -- any version -- is pretty simple. 
So why not trace out the scheamtic. It wouldn't take more than an 
afternoon...

I think all the versions of VT100 video board that I've seen use the same 
flyback transfoemr (separately mounted on the chssis) which is a great 
help. Figuring out the windings of the flyback is a pain, becuase they 
have such a low DC resistnace that the show as a dead short on most 
ohmmeter.

Desodler any low-resistnace compoennts from the PCB (inductoctors, 
transfofmers, fuses, etc ) before you start, and then start tracing 
connections with an ohmmeter. You amy find much fo the ciruitry is 
similar to one of the boards in the manual, which is a help. 

If I can mange to do machines with a couple of hundred ICs, then I am 
sure yoy can manage the VT100 video board...

-tony