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HAM Radio 3.2
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Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO
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rtty
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tlmdc
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tmp.c
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C/C++ Source or Header
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1990-01-29
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1KB
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58 lines
#include <dos.h>
int rcvbyte(com_port)
int com_port;
{
union REGS inreg, outreg;
int ch;
/* If there is a character waiting get it and return it, otherwise, return
-1 */
if(instat(com_port) != 0){
inreg.x.dx = com_port;
inreg.h.ah = 2;
int86(0x14, &inreg, &outreg);
ch = (0xff & outreg.h.al);
return ch;
} else return -1;
}
/* Check to see if there is a character in the MBBIOS buffer */
int instat(p)
int p;
{
union REGS inreg, outreg;
inreg.x.dx = p;
inreg.h.ah = 3;
int86(0x14,&inreg,&outreg);
return( (0x01 & outreg.h.ah ) );
}
putcom(p,ch)
unsigned char ch;
int p;
{
union REGS inreg, outreg;
inreg.x.dx = p;
inreg.h.ah = 3; /* check comm line status */
/* mask to check if cts on and xmtr rgstr empty */
do int86(0x14, &inreg, &outreg);
while((0x2010 & outreg.x.ax) != 0x2010);
inreg.x.dx = port;
inreg.h.ah = 1; inreg.h.al = ch;
int86(0x14, &inreg, &outreg);
}
void asc_enab()
{}
void asc_disab()
{}