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FCT1C.C
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C/C++ Source or Header
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1993-03-30
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800b
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41 lines
#include <dos.h>
#include <stdio.h>
main()
{
struct REGPACK sregs;
int y,x,water,dx;
union REGS regs;
printf("\nEnter DX : ");
scanf("%d",&dx); while(kbhit()) getch();
Choose:
printf("\nA) Set TX Low Water ");
printf("\nB) Set RX Low Water ");
printf("\nC) Set RX High Water : ");
switch(toupper(getch()))
{
case 'A' : y=0; break;
case 'B' : y=1; break;
case 'C' : y=2; break;
default : goto Choose;
}
printf("\nEnter New water mark : ");
scanf("%x",&water); while(kbhit()) getch();
regs.h.ah = 0x1c;
regs.h.al = (unsigned char)y;
regs.x.bx = water;
regs.x.dx = dx;
printf("\nCall - AH : %02X AL : %02X BX : %04X",regs.h.ah,
regs.h.al,regs.x.bx);
int86(0x14,®s,®s);
printf("\nReturn - AH : %02X",regs.h.ah);
}