/* tej - changed return type to void as nothing returned */
static void InitMFS(void)
{
FAR_PTR LOL;
FAR_PTR SDA;
unsigned char _osmajor;
unsigned char _osminor;
state_t preg;
LOL = GetListOfLists();
SDA = GetSDAPointer();
/* now get the DOS version */
pre_msdos();
HI(ax) = 0x30;
call_msdos();
_osmajor = LO(ax);
_osminor = HI(ax);
post_msdos();
/* get DOS version into CX */
preg.ecx = _osmajor | (_osminor <<8);
preg.edx = FP_OFF16(LOL);
preg.es = FP_SEG16(LOL);
preg.esi = FP_OFF16(SDA);
preg.ds = FP_SEG16(SDA);
preg.ebx = 0x500;
mfs_helper(&preg);
}
int com_dosgetdrive(void)
{
int ret;
pre_msdos();
HI(ax) = 0x19;
call_msdos(); /* call MSDOS */
ret = LO(ax); /* 0=A, 1=B, ... */
post_msdos();
return ret;
}
int com_dossetdrive(int drive)
{
int ret;
pre_msdos();
HI(ax) = 0x0e;
LO(dx) = drive; /* 0=A, 1=B, ... */
call_msdos(); /* call MSDOS */
ret = LO(ax); /* number of available logical drives */
post_msdos();
return ret;
}
int com_dosfreemem(u_short para)
{
int ret = 0;
pre_msdos();
HI(ax) = 0x49;
SREG(es) = para;
call_msdos();
if (REG(eflags) & CF)
ret = -1;
post_msdos();
return ret;
}
int com_dosallocmem(u_short para)
{
int ret;
pre_msdos();
HI(ax) = 0x48;
LWORD(ebx) = para;
call_msdos();
if (REG(eflags) & CF)
ret = 0;
else
ret = LWORD(eax);
post_msdos();
return ret;
}
int com_dossetcurrentdir(char *path)
{
/*struct com_starter_seg *ctcb = owntcb->params;*/
char *s = com_strdup(path);
com_errno = 8;
if (!s) return -1;
pre_msdos();
HI(ax) = 0x3b;
SREG(ds) = DOSEMU_LMHEAP_SEG;
LWORD(edx) = DOSEMU_LMHEAP_OFFS_OF(s);
call_msdos(); /* call MSDOS */
com_strfree(s);
if (LWORD(eflags) & CF) {
post_msdos();
return -1;
}
post_msdos();
return 0;
}
