KrNews #07 15 января 1999

Железо

Modem - The problem of connecting modems to the machines to separate the fields of memory.

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       Krasnodar - a tricky business ...
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(C) VTS'99


    It is time to talk about a possible
trouble connecting modems to the machines, with separate fields 
of memory. 


    The problem is that when
finding modem driver in the brake
page konnekta still will not work,
even if used for strobing
WAIT / modems XTR. According to a fatal accident # 06 page that 
contains the line driver MMD, the standard extension of 
machines such as "Krasnodar", "Impulse", "Amstrad +2 A, +3", is 
brake. At the same time, there is another standard for memory 
expansion, such as in Sinclair_128 (page # 06 - fast) 

-Amstrad +2 A, +3: fast pages - 0,1,2,3

                 slow pages - 4,5,6,7
-Sinclair_128: fast pages - 0,2,4,6

                 slow pages - 1,3,5,7

The solution is to entanglement D0 and D2,
going to the # 7FFD.

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           3, 3
D0 >--------->| D0 |; D0 >---- ----->| D0 |

             | D1 |; / | D1 |

           6 | |; / 6 | |
D2 >--------->| D2 |; D2 >---- ----->| D2 |

                  ;
Z80 # 7FFD; Z80 # 7FFD

     was TM9; have TM9
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  In most cases, the register # 7FFD
implemented on K555TM9.

  Most often the data to it summed up
normal [at D0 TM9 (in directory) -
D0 CPU, etc].


    Then proceed as follows
as follows:

1) Find the register memory expansion # 7FFD

   m / K555 (1533, etc.) TM9.

    For components such as "Krasnodar", "They
  pulse "(originally the 48th) to make

  it is very simple. This m / s to search

  kerchief on memory expansion - there

  there are no other TM9's.

2) Find its conclusions 3 and 6.

3) unsolder from these findings, the wiring

  (Or perezat track).

4) mix them with each other and ice
  yat.


    The only possible problem
can assume a certain incompatibility
with the program, zafiksennymi under the "Krasnodar"
(Amstrad-to-native memory), although such
You can meet very rarely, and most
just only in Krasnodar. These prog are a couple of old issues
KrNews (without AutoConfig'a).

    The remaining program (intensive) or
do not rely on "Krasnodar"
or (foreigners) is fixed at both
(Amstrad and Sinclair) configuration.


    Well, if someone is important, place
switch (as Oleg aka Nik-O).


              .___________ D0 (3/TM9)

   D0________ / |

              ._______|___ D2 (6/TM9)

                     | |

              .______|| # 7FFD

   D2________ / |

              ._______|

  Z80


PS from Viper> The real problem
not hard'e, and soft'e and will be better
remake MMD 2.20 for AutoConfig. So
will be much easier. I do not promise, but
maybe I'll do it - but not free! :)

  And about that program running in slow pages can be found 
toloko in Krasnodar - not true! 

  For someone who wrote a program on your computer with the 
general field of memory is usually not known that this page is 
slow to takomto bastard and as a result of such programs shaft 
everywhere. There is no guarantee that This page will not be 
stopping in any particular model. The exception is only 0-th 
page - I have not seen Spectrum clone with brake 0th page. So 
what to do in the 128th programs AutoConfig!