Forum - VP Fedin. Refinement Profi for conflict-free peripheral connectivity.

<b>Forum</b> - VP Fedin. Refinement Profi for conflict-free peripheral connectivity.

(C) Pavel Fedin, Moscow.


      Refinement for Profi

  conflict-free connection

           periphery.


   I already wrote about the problem with the connection of 
additional devices to your computer Profi, but it seems that I 
managed to solve it. Now you are finally able conflict-free 
connect to your modem, Profi, Kempston Mouse and all that

whatever. Quote shemku, allowing it to carry out.

                   _______

                   EXTIORQ

/ \ / \


_______
OUTIORQ CP / M

 Signal (NO) OUTIORQ taken from
System size sockets (pin
A15). With signal CP / M is more complicated.
Look on the bottom board computer chip TM8, with output
which removed the signal (NO)
CP / M. Previous conclusion should
be free. From this conclusion and
clear signal of CP / M. I will illustrate what has been said a 
couple of examples. 

1) For version 5:

 April 2

  0 X
 5 0 3 _____

  1 O NOROM
July 12

  2 X CP / M
13 Aug. 1 ____

  3 O CP / M
 September 1910

  C
 1 February 1911
 OR O X

          15

             80DS

        March 14 ____

         O 80DS

DD46. 1533TM8.

2) For Version 4:


  TM9



        KP11



        TM8.Vot this chip,

                Conclusion 10.
O LL1


Unfortunately, I could not identify the name of this chip in 
the circuit. 

   For other versions of Profi
signal CP / M will have to find ourselves. Just do not confuse 
it with that is displayed on the system

connector! There appears (NOT) CP / M,
which must be inverted, and with this chip
it can be removed in an already proinvertirovannom form. The 
resulting signal (NOT) EXTIORQ output to the system connector 
on the contact A7, which is originally not used. To him, 
instead of (NOT) OUTIORQ and connect the modem, Kempston Mouse 
and others. 

   For those who still lazy
look for the signal CP / M, I suggest
the second option, which can
be made as small
board, is inserted into the system
slot and having at the other end
slot since (NOT) EXTIORQ. But note that I had not tried it. I 
myself, I gathered option 1. 

                         _______
_______ EXTIORQ
OUTIORQ July 4

               1 6 1 O

           May 3 O 8
____ 1 O X
CP / M +5 B

          X DD - LE5.



        ____
 Signal CP / M is taken from a contact
B30. +5 V - A5, housing - A8.


   For those wishing to get to the core
the case will explain the work of this shemki.
The computer is a signal
(NOT) CP / M, the shooting straight from the port # DFFD, 
realized this most TM8. It is equal to 0 when

access to additional devices, Profi, causing conflicts 
resolved, and is equal to 1 when he denied. The principle of 
operation of the scheme is based on blocking access to the 
conflicting at the periphery of the access allowed to the 
additional devices Profi. To this end, we take an inverted (NO) 
CP / M and knead it with (NOT) OUTIORQ. The resulting (NOT) 
EXTIORQ may be active only when additional devices Profi 
disabled. That's on him instead of (NOT) OUTIORQ and hang all 
that had not wanted to work. All

problem solved!

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