On-Line #05 08 октября 1995

Profi     Программирование

PROFI CP / M - On a computer screen "Profi".

                PROFI CP / M


 Hello, people. Here I am, (LD SOFT) decided to write about 
"PROFI CP / M ". You just might ask:" Why is it necessary? ".

I will answer you. Under CP / M no one wants to write, because 
they think it is very fancy, difficult, and unnecessary system. 
But this not so. There, in the CP / M'e one screen which is (we 
are talking about ONLY PROFI'fskom CP / M). I'll tell you about 
the characteristics of this machine and you will see what can 
be done.  Today I will tell you about the screen.



                          1.Ekran

                         -------- Resolution.
------------ Resolution 512 X 240 pixels.
 Color resolution: each byte can be colored with two
color: INK and PAPER to different for INK'a PAPER'a and 
brightness. 

 Device screen.
------------------- Advanced screen is arranged as follows:
He is almost two SPECTRUM screen, but they
some countries are:
 with the address 49152 is the first screen,
 but with the address 57344 is the second screen.
 All in all it looks like this:



                                             And so on up

                                              64 familiarity



           30 familiarity
 - The first screen;
 - The second screen;

Occupies the screen all the 16K segment (memory page).
Consequently, half is 8Kb.

 Segment attributes arranged in the same way, only instead of 
points fit attribute byte.


Assigning bits attribute byte:
Bits 0-2 set the color of the INK
5.3 bits determine color PAPER
bit 6 if 1, then increases the brightness of the color INK
Bit 7, if 1, then increases the brightness of colors PAPER

 Incidentally, I first thought that with such a screen to work 
very difficult, but experience has shown that there is not much 
work more difficult than with SPECTRUM'ovskim. But more on that 
in the following articles.


 Still, if you have v5.00 and above board and there (unless of 
course you is set) is a palette of 16 out of 256 colors. Below

program using this palette.


          CALL M2

          LD D, 16

          LD E, 15

          LD C, 126

          LD B, 0

          LD HL, TABL

          LD A, E

          HALT

          OUT (C), A
M1 LD A, (HL)

          CP L

          LD B, A

          DEC E

          INC HL

          LD A, E

          AND 15

          OUT (C), A

          DEC D

          JR NZ, M1

          CALL M3

          LD A, 7

          OUT (254), A

          RET
M2 DI

          LD HL, (57)

          LD (M4 +1), HL

          LD HL, M5

          LD (1957), HL

          EI

          RET
M3 DI
M4 LD HL, 0

          LD (1957), HL

          EI

          RET
M5 DI

          RET I
DATA DEFB B1, B2, B3 ,..., B16; 0 <= Bn <= 255

 The numbers Bn set palette. Total numbers of 16 (color).

 So that now I have everything I wanted to tell you today
described and may be subject screen, I will continue in the next
release of ONLINE, but for now I bid you farewell and hope that 
something from what I nabredil come in handy!


PSGlyuk sync on the board v5.0 * ispralen!


                                              LD SOFT (Dennis)

                                              (095) 966 3610