PROFI CLUB - PROFI 3.02 and KEMPSTON MOUSE.

(C) Dr.DASH



             PROFI 3.02 (3.00)

                     and

              KEMPSTON MOUSE



   In this article I want to share their experiences
operating a computer in a remarkable
all respects, under no less remarkable title "PROFI". And it 
goes on version of this computer 3.00 and 3.02. Although

I admit that there is a chance coincidence of nizheskazanogo 
with other versions of "PROFI", most likely earlier. 


   So, if you have "PROFI 3.02 (3.00)",
you probably noticed that some
programs that work with KEMPSTON
MOUSE, and which is not equipped with
disconnection thereof, to say the least, work
strange ... And the strange thing is that
that the mouse pointer (arrow) starts
scamper across the screen and attempts to stop this outrage by 
pressing the control buttons, the program is not responding. 
Examples of such programs can serve e-zine "SPECTRUM PROGRESS"

The first issue, Pro Sound Creator, Network
Newspaper ZX NEWS, etc. So, after a little dorabotochki, you 
completely forget all these glitch! Yes, and modifying

You actually do not have to! On the contrary, we must remove 
something from the scheme! The thing is that the authors 
"PROFI", a version Boards 3.02, very correctly assembled

Port # FF, and moreover, that this is not
works, but because of this mistake, the owners
such a computer were presented with the above bugs with 
KEMPSTON MOUSE. 

  And another thing. I just can not say, but
I have serious suspicions that without
improvements described below, the "PROFI 3.02"
connect KEMPSTON MOUSE is not possible.

 Now, directly scheme improvements.

   (Parent (lower coz) fee).



                U57

               . U14

      Remove RAM3

   8 resistors



                                RAM2



                  U10 U9

                                RAM1



                                RAM0



    U57-8 * k82 (to remove)

    U14-555IR10

    U10-555IR23

    U9 - 555IR23

    RAM0 ... RAM3-565RU7 (565RU5)


  So, if you look at the wiring
scheme for its "PROFI", then easily find
this fragment. Now open the case
computer, get into the hands of pliers or
soldering iron, and boldly remove from the board all 8
resistors. After this most complex and
terribly tedious operation, close
computer and run any of the
previously non-performing programs. Everything OK?
QED!


  This revision was made on 3 computers, and for a long time
tested. Everything works without glitches!


  That's probably all I wanted to say.
If you have any questions, please write, call.



       What we can - help! Good luck!



                     Sincerely, Dr.DASH.


Yx