Inferno #02 01 мая 2001

Железо

Shelezyaka - Pagemaker: refinement of weaving displays the page number memory.

         In the world of light


(C) Shaitan / Stars of Keladan


 So it's time to talk about the modernization of our beloved 
computer, and just about to install a semblance of

placard. With this
simple device can be easily
know which page of memory in this
time becomes the processor (in bent!), or more simply, you will 
learn the number active page.

 Just want to warn you that this
chip is connected to any spec, y
which at least 128K of memory and memory
governed not by the PLA. Such a distorted,
In my (can not remember) was applied to
Krasnodar version.
 In order to do this mulyu,
In addition, it is necessary to find a place where
it prisabachit, you must pre-
thinking on the subject, in what form you
want to see nomerstranitsy. I can offer two options. The first 
in my Again, the view there is no need

apply, and then you will know why. But
a matter of taste, but of taste, as you know, do not argue, and 
the choice of a other option or any place does not affect

employment company.
 And so here they are the most options.
 1. In a seven-segment LED display is used such as ALS, or KLTS 
AL. Just want to say that such an option

has a very high visibility. But this
variant has a very big disadvantage, which overshadows the 
advantage of this option, namely, for frequent changes that is 
not uncommon in recent years, active page, for example with the 
second (2) on the fourth represents (4) and vice versa, you can 
see is not what is on Indeed. In this case, you will see

figure eight (8).
 2. The second option is the most
preferred. Ie Do you want to display on the unit LEDs. In this
If the LEDs are best set
in a row (vertically or horizontally
as you prefer, even diagonally)
the first of them will match the zero page, the second - the 
first page and so on until the last, the seventh page.

 Well, now it's time to touch
directly scheme of the device.
 First you need to talk about where
it's all connected.
 In every 128th car there is a port
# 7FFD, which is assembled on a chip
555TM9, or similar. It is with the outputs of this mikroshemki 
we will take signals. For gifted bring it

pinout.



            555TM9


      9 C TT

      1 R

      3 D0 Q0 2

      4 D1 Q1 5

      D2 Q2 6 7

     11 D3 Q3 1910

     13 D4 Q4 1912

     14 D5 Q5 1915


 Signal R is taken from the signal processor
RESET, D0-D5 - with a data bus, well, the signals Q0-Q5 - this 
is bitiki port # 7FFD. Go tell that this mikruha

to Taganrog has a number D52, at Scorpion call names D48, but 
on Sparc'ah D47. I would have told you and number on the 
Pentagon, but I have at hand is not his scheme, and find

it, I think, in the cellar.
 That moment came when we move
directly to the scheme of moulage.
 To begin your attention suggest
Three schemes for the first option, which
only differ in different types of indicators.



       K514ID1 AL304A, B

    7 13 7 5

  Q1 1 A

    January 12 6, the point

  Q2 2 B

    2 11 4

  Q3 4 C

    6 10 2 8

      8 D

                  September 1

               E

                 15 10 3

               F

    4 14 9
+5 V BI G



                          ALS321A

                          ALS324A

      K514ID4B IN ALS338A

    7 13 7 10

  Q1 1 A

    1 12 6 11

  Q2 2 B

    2 11 4 3

  Q3 4 C

    6 10 2 5

      8 D

                  9 1 4

    5 E

      WR 15 October 1912

               F

    4 14 9

      BI G


 Well, now you can look at the
scheme for the second option.


      K514ID11

      K514ID12

   September 13
 Q1 1 0>

   July 12
 Q2 January 2>

   11
 Q3 February 4>

                 5

               3>

                 4

               4>

                 3

               5>

                 2

               6>

   January 14

      E 7>



   October 15
+5 V P0 P1


 Well, as you imagine opofigey
sensitive attention to connection diagram
display the second screen.
 It's much easier than you may think.
For this you need with the same
TM'ki take signal Q3 and hang here so here shemku.

Q3>


 When you turn on the second screen LED
wakes to glow, and when you turn on the first
respectively go out.
 That's basically all that I wanted
tell you about the world's population
"SHELEZYAKA.