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Initclk changes (mainly by Lucho) 

git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@682 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2003-09-09 17:33:23 +00:00
parent b4bee283f9
commit 8c22873b3e
1 changed files with 9 additions and 38 deletions
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47
kernel/initclk.c
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@ -38,52 +38,26 @@ static char *RcsId =
/* WARNING - THIS DRIVER IS NON-PORTABLE!!!! */
/* */
STATIC int InitByteToBcd(int x)
{
return ((x / 10) << 4) | (x % 10);
}
STATIC int InitBcdToByte(int x)
{
return ((x >> 4) & 0xf) * 10 + (x & 0xf);
}
STATIC void InitDayToBcd(BYTE * x, unsigned mon, unsigned day, unsigned yr)
{
x[1] = InitByteToBcd(mon);
x[0] = InitByteToBcd(day);
x[3] = InitByteToBcd(yr / 100);
x[2] = InitByteToBcd(yr % 100);
}
void Init_clk_driver(void)
{
iregs regsT, regsD, dosregs;
static iregs regsT = {0x200}; /* ah=0x02 */
static iregs regsD = {0x400, 0, 0x1400, 0x101};
/* ah=4, ch=20^ ^cl=0, ^dh=dl=1 (2000/1/1)
* (above date will be set on error) */
iregs dosregs;
regsT.a.b.h = 0x02;
regsT.d.x = regsT.c.x = 0;
regsT.flags = 0;
init_call_intr(0x1a, &regsT);
if ((regsT.flags & 0x0001) || (regsT.c.x == 0 && regsT.d.x == 0))
{
goto error; /* error */
}
regsD.a.b.h = 0x04;
regsD.d.x = regsD.c.x = 0;
regsD.flags = 0;
init_call_intr(0x1a, &regsD);
if ((regsD.flags & 0x0001) || regsD.c.x == 0 || regsD.d.x == 0)
{
goto error;
}
init_call_intr(0x1a, &regsT); /* get BIOS time */
init_call_intr(0x1a, &regsD); /* get BIOS date */
/* DosSetDate */
dosregs.a.b.h = 0x2b;
dosregs.c.x = 100 * InitBcdToByte(regsD.c.b.h) +
InitBcdToByte(regsD.c.b.l);
dosregs.c.x = 100 * InitBcdToByte(regsD.c.b.h) /* century */
+ InitBcdToByte(regsD.c.b.l);/* year */
dosregs.d.b.h = InitBcdToByte(regsD.d.b.h); /* month */
dosregs.d.b.l = InitBcdToByte(regsD.d.b.l); /* day */
init_call_intr(0x21, &dosregs);
@ -95,7 +69,4 @@ void Init_clk_driver(void)
dosregs.d.b.h = InitBcdToByte(regsT.d.b.h); /*seconds */
dosregs.d.b.l = 0;
init_call_intr(0x21, &dosregs);
error:;
}