[DSP-10] Moth balled DSP-10 has some troubles

[kd7ts]

On Thu, 28 Mar 2013 16:52:08 -0700, Don AE5K <donj at ae5k.us> wrote:

> In addition, with a different laptop than from years ago (it is now a  
> Dell 610), I boot with a CD-R into MSDOS 6.22.  It works some of the  
> time, but earlier today when booting that way, I had to do it three  
> times before it went all the way properly.  I mention this as it could  
> be related I suppose to the main problem.  (Several years ago, the CD-R  
> boot worked like a charm every time so I know it is correct.)
>  Any ideas of where I can look?

Hi Don,

Just reading through your query, and putting 2 and 2 together. It appears  
you have the original EPROM that shipped with the EZKit Lite 2181.

This required that you use EZFAST.EXE or EZLD.COM to load UHF3.EXE to the  
2181 memory before loading UHFA.EXE to the PC memory.

If this is the case, seeing a screen full of stuff flying by means that  
the loader did not get the monitor which is needed to load the 2181 memory.

It is common with the factory EPROM that it MUST be reset every time to  
get the monitor back. Reset can be done by turning the DSP power off and  
back on, or by the little button inside the DSP box that is labeled  
"reset". This is not a fault, it is just how the monitor works in that  
application.

The EPROM has a distinctive and annoying sign on, some music and a female  
voice announcing it is ready. This is why I used to leave the speaker  
disconnected.

Anyway, your observation of screens flying by, seems to point to an  
original EPROM and the DSP not being reset. There is no way around this  
other than replacing the EPROM or ALWAYS doing a reset.

I don't see any hints from your previous messages that there is a computer  
problem.

Mike KD7TS