Programming - output text messages in 8x16 font.

 ┌──────────────────────────┐  
 │ ─── PROGRAMMING ─── │  
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intended for those who
enjoys programming
or wants to learn programming
vat. It will also be useful
for those who have already mastered enough
programming technique in ma-
tire codes and knows very well
assembler In this section the journal
nala you can publish
algorithms for your developments,
the procedures you wrote in
machine codes, interesting
programs in BASIC, etc.     
                                
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with knowledge you can significantly
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write your own at a high level
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Publishers reserve
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Preference is given to self-
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 To publish the program
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 a) Assembly text with
comments (preferably in
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 b) Code part.              
                                
                                
                                
                                
                                
                                
─────────────────────────────── 
OUTPUT TEXT MESSAGES 8*16 
─────────────────────────────── 
  Zubrikov D.E.
                  -------------
                                
 Recently,
many ways to print
text messages like
using the standard set or
loadable and sprite based
which is preferred
due to its variety of shapes,
sizes, etc.                 
                                
 But I want to offer your
attention to the printing subroutine
using a downloadable font
created in ARTSTUDIOby
A/a principle.                   
                                
 You may ask what the difference is and
                                
                                
advantage over sprite
font?  Main advantage
Of course it takes up memory. (All
subroutine along with font
takes about 1kB, for
comparison sprite font about
ZkB on average)                  
                                
 Well, about the other advantages or
The disadvantages are for you to judge.             
                                
 Now about theprogram:      
                                
 1. The program was typed from the address
43000 and takes 1100 bytes
along with one text
message. (see appendix)   
                                
 2. The program starts with
addresses 43050 followed by
output to BASIC.               
                                
                                
                                
────────────────────────────────
                                
 Further to your attention
the listing itself is provided
programs with detailed explanations
all actions.             
                                
 For the first time this subroutine is used
used in the loader-description-
research for the game REAL PRESIDENT company
ADDICTIVE GAMES LTD.  restore
captured and Russified by me.
                                
 LD HL,43844 switching
      LD (23606),HL font
      LD A,#02 open channel
      CALL 05633 "S"
      LDDE,44000 text
                       message
      CALL M1 subroutine
                  print top
                           letters
                                
                                
LD DE,44000               
 CALL M2 subroutine
                   print bottom
                           letters
      LD HL,15360 switching
                  to standard
      LD (23606),HL set
      RET return to
                          BASIC
M1 LD BC,00039 quantity
                        characters
                      for printing
      LD A,#14 installation
                         positions
      LD (44005),A print
K1 LD A,B                    
 OR C immediate
                          seal
      DEC Sun text
                     messages from
                        reverse
      RET Z output to
                                
                                
 calling
                       procedure
      LD A,(DE)                 
INC DE                    
RST 10                    
JR K1                    
M2 LD BC, 00039 quantity
                        characters
                      for printing
      LD A,#15 installation
                         positions
                       printing on
      LD (44005),A unit
                          more
K2 LD A,B                    
OR C                      
DEC Sun print
                       messages
                       from current
                       checking
      RET Z                     
LD A,(DE)                 
                                
                                
INC DE                    
PUCH BC                   
 LD B,#40 restrictions
                      for printing
                        characters
K3 SR B if
                         normal
                   then increaseby 20
      JP C, K4 and seal
                    character if
                         no, then
      DJNZ K3 is being printed
                         current
                          symbol
      LD B,#20                  
K5 INC A                     
DJNZ K5                 
K4 POR VS                    
RST 10                    
JR K2                 
                                
                                
                                
44000 11                  
44001 00 - PAPER        
44002 10                  
44003 01 - INK          
44004 16                  
44005 15 - TABULATION BY  
HORIZONTAL   
44006 00 - LEFT POSITION 
PRINT        
44007...44039 - TEXT     
MESSAGE     
                                
                                
 As you already understand, first we
type a capital letter and then
under it is small.  Based on
this you can now
yourself using one
from editors, for example
ARTSTUDIO create your own fonts.  
                                
 This subroutine is
                                
                                
the basis for a more powerful
program to be fenced off
already dear users.   
                                
────────────────────────────────
                                
                                
 Well, now we'll talk about
another program. You can po-
look how impressive this one isprogram
ma displays the menu. You can use
use this procedure at your own
their programs. About how to use
this procedure will be called
further.