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path: root/engines/avalanche/avbkgrnd.cpp
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#include "ptoc.h"


#include "graph.h"

integer gd,gm;
int main(int argc, const char* argv[])
{pio_initialize(argc, argv);
;
 gd=3; gm=0; initgraph(gd,gm,"c:\\bp\\bgi");
 /* Screen size: Starts at $A000:$320 (coords 0,10).
 Length: 12000 (150*80) bytes.
 If we divide it into sets of 5 lines (400 bytes) each, there are 30.
 There are 40 words on a line.

 Patterns:
  4AAA = "AVVY"
  AAAE
  EAA4
  A444

  A4AA = "YAVV"
  AEAA
  4EAA
  4A44 */
/*
 asm
  mov bx,$A000;
  mov es,bx; { The segment to copy it to... }
  mov di,$370;  { The offset (10 pixels down, plus 1 offset.) }

  mov cx,10;
  mov ax,$AA4A; call @sameline; { Print "AVVY" }
  mov ax,$AEAA; call @sameline;
  mov ax,$A4EA; call @sameline;
  mov ax,$44A4; call @sameline;

  mov cx,9;
  mov ax,$AAA4; call @sameline; { Print "YAVV" }
  mov ax,$AAEA; call @sameline;
  mov ax,$AA4E; call @sameline;
  mov ax,$444A; call @sameline;

  mov ax,$4AAA; call @sameline; { Print "VYAV" }
  mov ax,$AAAE; call @sameline;
  mov ax,$EAA4; call @sameline;
  mov ax,$A444; call @sameline;

  mov ax,$A4AA; call @sameline; { Print "VVYA" }
  mov ax,$EAAA; call @sameline;
  mov ax,$4EAA; call @sameline;
  mov ax,$4A44; call @sameline;

  jmp @the_end;

  { Replicate the same line many times. }

  @sameline:
   { Requires:
      what to copy in AX,
      how many lines in CX, and
      original offset in DI. }
   push cx;
   push di;

   @samelineloop:

    push cx;
    mov cx,40; { No. of times to repeat it on one line. }

    repz stosw; { Fast word-copying }

    pop cx;

    add di,1200; { The next one will be 16 lines down. }

   loop @samelineloop;
   pop di;
   add di,80;
   pop cx;

   ret;

  @the_end:
 end;
*/
return EXIT_SUCCESS;
}