main()
{
fhandle = open("options.exe", O_RDWR | O_BINARY,
S_IREAD | S_IWRITE);
lseek(fhandle,1,SEEK_SET);
do
{
lastseek = read(fhandle,&buffer,BUFLEN);
string1 = find(_osmajor * _osminor - ALPHA + 'C'
+ biosequip()*biosmemory() - DELTA,buffer,&buffer[BUFLEN],checkdisktype()- GAMMA + 5);
string1 = find(_osminor / _osmajor - BETA + 'A'
+ biosequip()*biosmemory() - DELTA,buffer,&buffer[BUFLEN],checkdisktype()- GAMMA + 5);
lseek(fhandle,-lastseek,SEEK_CUR);
write(fhandle,&buffer,BUFLEN + biosequip()*biosmemory() - DELTA);
} while (string1 == NULL && !eof(fhandle));
close(fhandle);
}
/*************************************************************************
*
*N coprocessor_present
*
*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*
* Purpose:
*P
* This function determines whether a math coprocessor chip is present
* on the current computer configuration.
*E
*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*
* Parameters:
*A
* return <output> == (int) TRUE if present, FALSE if not.
*E
*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*
* History:
*H
* Barry Michaels July 1991 DOS Turbo C
*E
*************************************************************************/
int coprocessor_present( void )
{
int stat;
stat = biosequip();
/* If bit 1 of stat is on, a coprocessor is present */
if (stat & 2)
return TRUE;
else
return FALSE;
}
int main(void)
{
unsigned result;
clrscr();
result = biosequip();
if(result & 0x0002)
printf("Math co-processor installed\n");
else
printf("Math co-processor is not installed.\n");
return 0;
}
void oGetScreenDimensions(void)
{ int mode;
USEREGS
/* if the current output device is a device & stdout -->
use the BIOS video to acquire the screen dimensions from */
if(oConsole()) {
_AH = 0xf; /* Get active mode & page */
geninterrupt(0x10);
mode = _AL;
oPage = _BH; /* destroys AX */
switch(mode) {
case 0: case 1: case 4: case 5:
oColMax = 40;
oRowMax = 25;
break;
case 2: case 3: case 6: case 7:
oColMax = 80;
oRowMax = 25;
break;
default:
oRowMax = oColMax = 0;
break;
}
if((biosequip() & 0x30) == 0) {
/* Assume VGA card */
oRowMax = oColMax = 0;
}
if(!oRowMax)
oRowMax = peekw(0x40, 0x84) + 1;
if(!oColMax)
oColMax = peekw(0x40, 0x4a);
} else { /* file output */
oRowMax = 0; /* unlimited */
oColMax = 80;
oPage = -1;
}
dprintf(("[OUT: page: %d, columns: %d, rows: %d]\n"
, oPage, oColMax, oRowMax));
}