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/*
** Tasker.C
**
** public domain by David Gibbs
*/
struct ts_os_ver t_os_ver[TOT_OS];
int t_os_type;
int t_os;
const char *t_os_name[TOT_OS] = {
"DOS",
"OS/2 DOS",
"DESQview",
"Windows Std",
"Windows 386"
};
int get_os (void)
{
union REGS t_regs;
t_os_type = 0;
t_os = 0;
/* test for DOS or OS/2 */
if (_osmajor < 10)
{
t_os_ver[DOS].maj = _osmajor;
t_os_ver[DOS].min = _osminor;
t_os_type = t_os_type | is_DOS;
}
else
{
t_os_type = t_os_type | is_OS2;
t_os_ver[OS2].maj = _osmajor/10;
t_os_ver[OS2].min = _osminor;
}
/* test for Windows */
t_regs.x.ax = 0x4680;
int86(0x2F, &t_regs, &t_regs);
if (t_regs.x.ax == 0x0000)
{
t_os_ver[WINS].maj = 3;
t_os_ver[WINS].min = 0;
t_os_type = t_os_type | is_WINS;
}
else
{
t_regs.x.ax = 0x1600 ;
int86(0x2F, &t_regs, &t_regs);
switch (t_regs.h.al)
{
case 0x00 :
case 0x80 :
case 0x01 :
case 0xFF :
break;
default :
t_os_type = t_os_type | is_WIN3;
t_os_ver[WIN3].maj = t_regs.h.al;
t_os_ver[WIN3].min = t_regs.h.ah;
break ;
} /* endswitch */
} /* endif */
/* Test for DESQview */
t_regs.x.cx = 0x4445; /* load incorrect date */
t_regs.x.dx = 0x5351;
t_regs.x.ax = 0x2B01; /* DV set up call */
intdos(&t_regs, &t_regs);
if (t_regs.h.al != 0xFF)
{
t_os_type = t_os_type | is_DV;
t_os_ver[DV].maj = t_regs.h.bh;
t_os_ver[DV].min = t_regs.h.bl;
}
if(t_os_type & is_DOS)
t_os = DOS;
if(t_os_type & is_WINS)
t_os = WINS;
if(t_os_type & is_WIN3)
t_os = WIN3;
if(t_os_type & is_DV)
t_os = DV;
if(t_os_type & is_OS2)
t_os = OS2;
return(t_os-1);
}
void t_slice(void)
{
union REGS t_regs;
switch (t_os)
{
case DOS :
break;
case OS2 :
case WIN3 :
case WINS :
t_regs.x.ax = 0x1680;
int86(0x2f,&t_regs,&t_regs);
break;
case DV :
t_regs.x.ax = 0x1000;
int86(0x15,&t_regs,&t_regs);
break;
} /* switch(t_os) */
}
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