ZX Ferrum #01 07 февраля 2004

Железо

Iron - Iron multicolor scheme - Hardware Multicolor.

Demon / DPC (c) 2003

WARNING! The article was written using material from newspaper
X-RAY and my personal experience!


                      Hardware Multicolor


                                         Oh, these stripes;)


  Now, I'll tell you how I did this shtukentsiyu. For those
who are in the tank (no offense;)), explains: Hardware 
Multicolor - Hardware implementation of multicolor (no, not one 
that the Border) or speaking in a normal (heh, heh ->) 
language, graphics mode 192x256 pix 16 colors in 1x8 pix, 
shorter than the byte pixel bytes attributes razbitovka 
attribute (wrapped in;)) is the same as in standard screen. The 
location of pixels with the address # 4000 both in standard 
screen attributes # 6000 addressing the same, ie: 

# 6000; the first line, it correspond to the pixels on the # 
4000 # 6100 and the second

# 6200
...


  For example:


        LD HL, # 4000, 8-O

        LD B, 7, seven lines
PP LD (HL), # FF; line

        SET 5, H; set the fifth bit # 40 + # 20 = # 60

                      ; Very convenient and fast

        LD (HL), B; stavin attribute

        RES 5, H; vertaem address pixels

        INC H

        DJNZ LP

        RET


  We get seven lines in the upper left corner of the screen 
painted different colors!


  Gap between regions is formed in two kilobytes to as
just get the system variables and buffer mp-dos. By the way all 
of the above applies to the second screen, there are 
attributes, respectively, from the address # E000, using its 
save over 12 kilobytes. 

  Despite the fact that the volume of the screen has almost 
doubled process it is quite possible.



  Many will say: "Why should it to us!". And that's why the 
scheme is simple to the disgrace, and provides an action 
possibilities more than the standard screen. Of course this 
does not solve all problems, but toys will be more colorful 
(and, moreover, in this mode UnrealSpectrum'e is, ay, sirs 
emulyatorschiki!). There is a demonstration toys (Heroes - is 
given in the appendix), which shows the possibility of this 
regime (krasochno!), and so it is not supported so far (ay, 
Gentlemen coders!) or in toys or in a graph utility (apparently 
due to lack of utilities, no toys). 


  Okay, it's all words, it's time to move on to the case.

The scheme presented in X-RAY # (2 or 3, can not remember) for 
the Pentagon: 


vyv.8/D15 (D28)>


           +5 V>> vyv.1/D14 (D32)
vyv.9/D15 (D28)> * (pre-tear)


      total ()> *> A

                                 (Pre-tear)


                              > Vyv.11/D17 (D34)

                                 (Pre-tear)
(In parentheses the numbering scheme for the company "Cervus 
Elaphus") 


                            Scheme 1

Very simple!

  Legend:

  -> Join, cutting off the old signal


  A signal - it's the scheme:


                        B18


                             D8

                        B13 D51

                               1

                        C29 o 1o



                            Scheme 2


  C29 signal suitable for mikruhe D8, for Solonovskogo Pentagon
this leg 3, and for the usual 6.

  This signal is responsible for the selection of address bytes 
Graphics / byte attribute is selected at logic 0 bytes of 
graphics (addressing the nonlinear scheme), ie, when applied to 
his log. 0 is a constant, and graphics and attributes will be 
selected by the same scheme. 


  Incidentally, I have to work, only if done a different way:



     vyv.8/D15>


           +5 V>> vyv.1/D14

    vyv.10/D51 * (pre-tear)


     vyv.8/D12> vyv.5/D17

         common> (pre-tear)


                              > Vyv.11/D17

                                 (Pre-tear)


                            Scheme 3


  Theoretically, the scheme 1 and 3 are the same, but I have to 
practice, attributes are read not to address # 6000. 


  For those wishing to put a multiplexer and can include a mode 
of Port # EFF7 bit 0.




  Now the scheme for multicolor PROFI (given unchanged
and I did not tested):



        Refinement of the computer "PROFI" for PCB version 3.X

vyv.9/U26> *

 total ()> *> vyv.10/U41 (pre-tear)

                          > Vyv.1/U33 (pre-tear)


                         > Vyv.11/U15 (pre-tear)


                            Scheme 4

Note: The numbering of the chip is given for the lower fees, 
according to the scheme firm "KRAMIS" (now "Condor") for 
version 3.2 


     Refinement of the computer "PROFI PLUS" for versions 5.X 
boards 

 vyv.5/DD14> *


   total ()> *> vyv.13/DD26 (pre-tear)
vyv.11/DD10> vyv.5/DD33 (pre-tear)


                         > Vyv.6/DD59 (pre-tear)


                            Scheme 5

Note: The numbering of the chip is given for the lower fees, 
according to the scheme Company Condor "for version 5.0