Import backup from 2004-01-26

Functions.c

@@ -45,6 +45,18 @@ char *strcat(char *dest, char *src)
 }
 
 
+//converts a binary-coded-decimal byte to its decimal equivalent
+inline byte bcd2byte(byte bcd)
+{
+ 	return (10* ((bcd & 0xF0) >> 4)) + (bcd & 0x0F);
+}
+
+//converts a binary-coded-decimal byte to its decimal equivalent
+inline byte byte2bcd(byte bite)
+{
+	return ((bite / 10) << 4) | (bite % 10);
+}
+
 void	rtrim(char *str)
 {
 	str += strlen(str);	//now points to the null character at the end of the string
@@ -182,6 +194,79 @@ inline dword kernel_size()
 }
 
 
+//These functions are for reading and writing various values stored on the CMOS Real Time Clock
+byte	rtc_readDay()
+{
+	outportb(0x70, 7);
+	return bcd2byte(inportb(0x71));
+}
+
+byte	rtc_readMonth()
+{
+	outportb(0x70, 8);
+	return bcd2byte(inportb(0x71));
+}
+
+byte	rtc_readYear()
+{
+	outportb(0x70, 9);
+	return bcd2byte(inportb(0x71));
+}
+
+byte	rtc_readSecond()
+{
+	outportb(0x70, 0);
+	return bcd2byte(inportb(0x71));
+}
+
+byte	rtc_readMinute()
+{
+	outportb(0x70, 2);
+	return bcd2byte(inportb(0x71));
+}
+
+byte	rtc_readHour()
+{
+	outportb(0x70, 4);
+	return bcd2byte(inportb(0x71));
+}
+
+void	rtc_setDay(byte day)
+{
+	outportb(0x70, 7);
+	outportb(0x71, byte2bcd(day));
+}
+
+void	rtc_setMonth(byte month)
+{
+	outportb(0x70, 8);
+	outportb(0x71, byte2bcd(month));
+}
+
+void	rtc_setYear(byte year)
+{
+	outportb(0x70, 9);
+	outportb(0x71, byte2bcd(year));
+}
+
+void	rtc_setSecond(byte second)
+{
+	outportb(0x70, 0);
+	outportb(0x71, byte2bcd(second));
+}
+
+void	rtc_setMinute(byte minute)
+{
+	outportb(0x70, 2);
+	outportb(0x71, byte2bcd(minute));
+}
+
+void	rtc_setHour(byte hour)
+{
+	outportb(0x70, 4);
+	outportb(0x71, byte2bcd(hour));
+}
+
 
 
 

functions.h

@@ -25,7 +25,20 @@ char *strcat(char *dest, char *src);
 void	rtrim(char *str);
 char	*ucase(char *str);
 char	*lcase(char *str);
-
+inline byte bcd2byte(byte bcd);
+inline byte byte2bcd(byte bite);
+byte	rtc_readDay();
+byte	rtc_readMonth();
+byte	rtc_readYear();
+byte	rtc_readSecond();
+byte	rtc_readMinute();
+byte	rtc_readHour();
+void	rtc_setDay(byte dat);
+void	rtc_setMonth(byte month);
+void	rtc_setYear(byte year);
+void	rtc_setSecond(byte second);
+void	rtc_setMinute(byte minute);
+void	rtc_setHour(byte hour);
 
 
 

kernel.c

@@ -82,9 +82,11 @@ void k_init()
 	printf("HOS 0.13 - Kernel File Size: %u kb\tData Size: %u bytes\n", kernel_size()>>10, (dword)(&_end)-(dword)(&_code));
 	printf("Memory available to OS: %u MB (%u bytes)\n", mm_megabytes, mm_totalmem);
 	printf("Free memory: %u bytes (%u pages)\n", mm_freemem(), mm_freemem()>>12);
+	printf("%d/%d/%d\t%d:%d:%d\n", rtc_readMonth(), rtc_readDay(), rtc_readYear(), rtc_readHour(), rtc_readMinute(), rtc_readSecond());
 	printf("Root Directory: %s/\n", rootDevice->id);
 
-	int a;
+
+/*	int a;
 	byte *addr = 0;
 	for (a = 0; a < 5; a++)
 	{
@@ -97,6 +99,7 @@ void k_init()
 	memcpy(0, addr, 4192);
 	asm("call 0");
 	free(addr);
+*/
 
 	dword key = 0;
 	for (;;)