City #36 11 декабря 1999

Железо

Iron - expanding the scheme to 512x192 video mode Scorpion points.

          Saransk. Republic of Mordovia

 Free computer magazine for ZX SPECTRUM



                # 36 of 12.12.99g



   PREAMBLE ************* **************


(C) V. Kazakov


  Hi!



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


(C) V. Kazakov


  Today I present to your attention the article, courtesy of 
giving me the Hardy / FLASH. Author me to Unfortunately, not 
known. The article is published with minor cuts. 


      Schemes to enhance video modes SCORPIO

      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

              Up to 512 x 192 POINTS

              ~~~~~~~~~~~~~~~~~~

              (For yellow cards)


                                    Cx *

                                 * -
                               Rx |

                                     |

                                     o> D33/11!

                   1533KP11

                                        > D34/11!
 __ (TI) D2 / 5> 0 MX
(TI) D2 / 6> 1

                   2 0> D40 / 9!
 ! (H2) D3 / 6> o March 1> D39 / 7!

                          2> D17 / 6!
 __ (14) D1 / 6> 0 3> D1 / 9 (H2 *)
(14) D1 / 5> 1

                   2

                o 3


             o V

                o oC



                                        > D34/10!

                        o> D33/10!

    ______ 1533LE1

   (BORDER) ___

        D13 / 6> 1 1o (SCR) D14 / 8> 1o 1o

                 o (RAS *) D2 / 8>


                  1533LE1 ____

                                   (SCR *)

               LN2! D39/15 <


        D35 / 5> 1o o> D33 / 3!

      (BRD2)

                        o> D33 / 4!


                           > D34 / 3!


                  555ID7


         __ 4 _ DC 0 T 0

         WR> oE 11 D1> 1 January

               5 _ 4o

        D55 / 7> oE

               6 C

        A13> E oR

               1

        A12> 0 ___ 555TM9

               2 RES>

         A3> 1

               3

        A15> 2



  All designations for chips are given a yellow card
Scorpio. Date of registration fees - in 1994. Up to oblique
features indicate the number of chips, after the - pin number. 
Conclusions that should be visible hours are marked with an 
exclamation mark "!". Are given in parentheses denote signals 
if an asterisk - this is not quite what was on the board.


  The following conclusions circuits must be disconnected from 
the board or cut the track so that turned out to be 
disconnected only those findings, 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. Advanced Mode
screen color is determined by the color of the curb, and the 
color assigned points to 0 or 7, depending on the 2 nd bit 
color border (counting from 0-th). If the color of the curb 
lies in the range 0 .. 3 is the color set of points will be 
white, otherwise - in black. 

  Half of the images is located at # C000 and
is # 1800 bytes. The other half is for
at # E000. The image may be a fifth or 7
Th banks, depending on the third bit is the port # 7FFD.
Characters on the screen alternates - one in one half, and 
another the next. 

  On some of the most distinct from other computers
will be a glitch - the colors and picture in normal mode will 
be a little match - will sometimes A black or white thin 
stripes vertikoalnye height from one to znakometsa whole screen.


  Glitch is corrected by introducing a resistor Rx 0.1-1
ohms. If not eliminated, but with increasing resistance band 
decreases, and then nothing at all not visible - it is 
necessary to solder the capacitor Cx in the 100-500 pF - chosen 
at random. If an increase in the resistor strip increases, or 
it no scorpion or not the yellow card.


  I have been working for 2 months - do not worry
has not happened yet. Only this mode is not used anywhere 
except in the Melon. : (