City #37 17 декабря 1999

Железо

Iron - schema extension video mode to 512x192 pixels for turbocharged Scorpion.

  PLANET SHELEZYAKA ********** *************


(C) V. Kazakov


  This article is a logical prodolzheiem articles from the last 
issue, where he gave the scheme expansion of conventional video 
mode Scorpio. This once I give the same scheme for 
turbo-Scorpion. 

  The material was provided by Hardy / FLASH. The author, a
Unfortunately, not known.


     Schemes to enhance video modes TO 512 x 192

        POINTS FOR turbirovanie SCORPIO


                      o> D33/11

           1533KP11

                         > D34/11
 D2 / 5> 0, MX
 D2 / 6> 1

           2 0> D40 / 9
 D3 / 6> o March 1> D39 / 7

                  2> D17 / 6
 D1 / 6> 0 3> D1 / 9
 D1 / 5> 1

           2

        o 3

EXT> o V

        o oC



                     > D34/10

                 o> D33/10

                      1533LE4 1533LE1

D13 / 6> 1 1o D31/12> 1o 1o

         o o D15 / 1>



  1533LE1

       LN2 D39/15 <

D35 / 5> 1o o> D33 / 3


                o> D33 / 4


                   > D34 / 3 EXT <

          555ID7


         _ DC 0 T 0
D55 / 7> oE 13 D1> 1 January

         _ 2o
A12> oE

                             C
 A6> E or

       1
 A3> 0 ___ 555TM9

       2 RES>
A15> 1
 __ 3
 WR> 2



  All designations for chips are given a green card
Scorpio. For yellow you can try to take the scheme
Green Scorpion, in principle, they should be similar (only the 
turbo-charges). Before the slash indicate the number of chips, 
after - the number of output. 

  The following conclusions circuits must be disconnected from 
the board or cut the track so to have been disconnected only 
those conclusions and only those chips!


 D3 / 6 - H2 IE7
 D17 / 6 - ADDRESS SCREEN KP11
 D33 / 3,4,10,11 - VIDEO KP13
 D34 / 3,10,11 - VIDEO KP13
 D39 / 7,15 - REGISTER IR10
 D40 / 9 - REGISTER IR16


  Advanced mode is enabled by setting the 1 st bit
(Counting from 0-th) ports # EFF7. In Advanced mode, the screen 
color is determined by the color of the curb, and color 
assigned points to 0 or 7, depending on 2-nd bit color border 
(counting from 0-th). 

  If the color of the curb is in the range 0 .. 3 is the color
set of points will be white, otherwise
- Black.

  Half of the images is located at # C000 and
is # 1800 bytes. The other half is
at # E000.

  The image can be in the fifth or seventh banks
dependence on third-bit port # 7FFD. Symbols on
alternate screen - one in one half and the other
- In the next.

  If the screen will disappear individual pixel rows 
(vertically), then try to solder a capacitor to 15 foot D39 
capacity somewhere up to 750 pF (or more, I had put on 750 pF)