diff --git a/sys/amd64/amd64/tsc.c b/sys/amd64/amd64/tsc.c
index be0284049f0..9dba18b0e60 100644
--- a/sys/amd64/amd64/tsc.c
+++ b/sys/amd64/amd64/tsc.c
@@ -398,18 +398,29 @@ sysbeep(int pitch, int period)
 /*
  * RTC support routines
  */
+static int
+bcd2int(int bcd)
+{
+	return(bcd/16 *	10 + bcd%16);
+}
 
-static __inline void
+static int
+int2bcd(int dez)
+{
+	return(dez/10 *	16 + dez%10);
+}
+
+static inline void
 writertc(u_char reg, u_char val)
 {
 	outb(IO_RTC, reg);
 	outb(IO_RTC + 1, val);
 }
 
-static __inline int
+static int
 readrtc(int port)
 {
-	return(bcd2bin(rtcin(port)));
+	return(bcd2int(rtcin(port)));
 }
 
 /*
@@ -512,9 +523,9 @@ resettodr()
 
 	tm -= tz.tz_minuteswest * 60 + adjkerntz;
 
-	writertc(RTC_SEC, bin2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
-	writertc(RTC_MIN, bin2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
-	writertc(RTC_HRS, bin2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
+	writertc(RTC_SEC, int2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
+	writertc(RTC_MIN, int2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
+	writertc(RTC_HRS, int2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
 
 	/* We have now the days	since 01-01-1970 in tm */
 	writertc(RTC_WDAY, (tm+4)%7);			/* Write back Weekday */
@@ -525,10 +536,10 @@ resettodr()
 
 	/* Now we have the years in y and the day-of-the-year in tm */
 #ifdef USE_RTC_CENTURY
-	writertc(RTC_YEAR, bin2bcd(y%100));		/* Write back Year    */
-	writertc(RTC_CENTURY, bin2bcd(y/100));		/* ... and Century    */
+	writertc(RTC_YEAR, int2bcd(y%100));		/* Write back Year    */
+	writertc(RTC_CENTURY, int2bcd(y/100));		/* ... and Century    */
 #else
-	writertc(RTC_YEAR, bin2bcd(y - 1900));          /* Write back Year    */
+	writertc(RTC_YEAR, int2bcd(y - 1900));          /* Write back Year    */
 #endif
 	for (m = 0; ; m++) {
 		int ml;
@@ -541,8 +552,8 @@ resettodr()
 		tm -= ml;
 	}
 
-	writertc(RTC_MONTH, bin2bcd(m + 1));            /* Write back Month   */
-	writertc(RTC_DAY, bin2bcd(tm + 1));             /* Write back Month Day */
+	writertc(RTC_MONTH, int2bcd(m + 1));            /* Write back Month   */
+	writertc(RTC_DAY, int2bcd(tm + 1));             /* Write back Month Day */
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, RTCSB_24HR | RTCSB_PINTR);
diff --git a/sys/amd64/isa/clock.c b/sys/amd64/isa/clock.c
index be0284049f0..9dba18b0e60 100644
--- a/sys/amd64/isa/clock.c
+++ b/sys/amd64/isa/clock.c
@@ -398,18 +398,29 @@ sysbeep(int pitch, int period)
 /*
  * RTC support routines
  */
+static int
+bcd2int(int bcd)
+{
+	return(bcd/16 *	10 + bcd%16);
+}
 
-static __inline void
+static int
+int2bcd(int dez)
+{
+	return(dez/10 *	16 + dez%10);
+}
+
+static inline void
 writertc(u_char reg, u_char val)
 {
 	outb(IO_RTC, reg);
 	outb(IO_RTC + 1, val);
 }
 
-static __inline int
+static int
 readrtc(int port)
 {
-	return(bcd2bin(rtcin(port)));
+	return(bcd2int(rtcin(port)));
 }
 
 /*
@@ -512,9 +523,9 @@ resettodr()
 
 	tm -= tz.tz_minuteswest * 60 + adjkerntz;
 
-	writertc(RTC_SEC, bin2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
-	writertc(RTC_MIN, bin2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
-	writertc(RTC_HRS, bin2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
+	writertc(RTC_SEC, int2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
+	writertc(RTC_MIN, int2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
+	writertc(RTC_HRS, int2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
 
 	/* We have now the days	since 01-01-1970 in tm */
 	writertc(RTC_WDAY, (tm+4)%7);			/* Write back Weekday */
@@ -525,10 +536,10 @@ resettodr()
 
 	/* Now we have the years in y and the day-of-the-year in tm */
 #ifdef USE_RTC_CENTURY
-	writertc(RTC_YEAR, bin2bcd(y%100));		/* Write back Year    */
-	writertc(RTC_CENTURY, bin2bcd(y/100));		/* ... and Century    */
+	writertc(RTC_YEAR, int2bcd(y%100));		/* Write back Year    */
+	writertc(RTC_CENTURY, int2bcd(y/100));		/* ... and Century    */
 #else
-	writertc(RTC_YEAR, bin2bcd(y - 1900));          /* Write back Year    */
+	writertc(RTC_YEAR, int2bcd(y - 1900));          /* Write back Year    */
 #endif
 	for (m = 0; ; m++) {
 		int ml;
@@ -541,8 +552,8 @@ resettodr()
 		tm -= ml;
 	}
 
-	writertc(RTC_MONTH, bin2bcd(m + 1));            /* Write back Month   */
-	writertc(RTC_DAY, bin2bcd(tm + 1));             /* Write back Month Day */
+	writertc(RTC_MONTH, int2bcd(m + 1));            /* Write back Month   */
+	writertc(RTC_DAY, int2bcd(tm + 1));             /* Write back Month Day */
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, RTCSB_24HR | RTCSB_PINTR);
diff --git a/sys/i386/i386/tsc.c b/sys/i386/i386/tsc.c
index be0284049f0..9dba18b0e60 100644
--- a/sys/i386/i386/tsc.c
+++ b/sys/i386/i386/tsc.c
@@ -398,18 +398,29 @@ sysbeep(int pitch, int period)
 /*
  * RTC support routines
  */
+static int
+bcd2int(int bcd)
+{
+	return(bcd/16 *	10 + bcd%16);
+}
 
-static __inline void
+static int
+int2bcd(int dez)
+{
+	return(dez/10 *	16 + dez%10);
+}
+
+static inline void
 writertc(u_char reg, u_char val)
 {
 	outb(IO_RTC, reg);
 	outb(IO_RTC + 1, val);
 }
 
-static __inline int
+static int
 readrtc(int port)
 {
-	return(bcd2bin(rtcin(port)));
+	return(bcd2int(rtcin(port)));
 }
 
 /*
@@ -512,9 +523,9 @@ resettodr()
 
 	tm -= tz.tz_minuteswest * 60 + adjkerntz;
 
-	writertc(RTC_SEC, bin2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
-	writertc(RTC_MIN, bin2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
-	writertc(RTC_HRS, bin2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
+	writertc(RTC_SEC, int2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
+	writertc(RTC_MIN, int2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
+	writertc(RTC_HRS, int2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
 
 	/* We have now the days	since 01-01-1970 in tm */
 	writertc(RTC_WDAY, (tm+4)%7);			/* Write back Weekday */
@@ -525,10 +536,10 @@ resettodr()
 
 	/* Now we have the years in y and the day-of-the-year in tm */
 #ifdef USE_RTC_CENTURY
-	writertc(RTC_YEAR, bin2bcd(y%100));		/* Write back Year    */
-	writertc(RTC_CENTURY, bin2bcd(y/100));		/* ... and Century    */
+	writertc(RTC_YEAR, int2bcd(y%100));		/* Write back Year    */
+	writertc(RTC_CENTURY, int2bcd(y/100));		/* ... and Century    */
 #else
-	writertc(RTC_YEAR, bin2bcd(y - 1900));          /* Write back Year    */
+	writertc(RTC_YEAR, int2bcd(y - 1900));          /* Write back Year    */
 #endif
 	for (m = 0; ; m++) {
 		int ml;
@@ -541,8 +552,8 @@ resettodr()
 		tm -= ml;
 	}
 
-	writertc(RTC_MONTH, bin2bcd(m + 1));            /* Write back Month   */
-	writertc(RTC_DAY, bin2bcd(tm + 1));             /* Write back Month Day */
+	writertc(RTC_MONTH, int2bcd(m + 1));            /* Write back Month   */
+	writertc(RTC_DAY, int2bcd(tm + 1));             /* Write back Month Day */
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, RTCSB_24HR | RTCSB_PINTR);
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index be0284049f0..9dba18b0e60 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -398,18 +398,29 @@ sysbeep(int pitch, int period)
 /*
  * RTC support routines
  */
+static int
+bcd2int(int bcd)
+{
+	return(bcd/16 *	10 + bcd%16);
+}
 
-static __inline void
+static int
+int2bcd(int dez)
+{
+	return(dez/10 *	16 + dez%10);
+}
+
+static inline void
 writertc(u_char reg, u_char val)
 {
 	outb(IO_RTC, reg);
 	outb(IO_RTC + 1, val);
 }
 
-static __inline int
+static int
 readrtc(int port)
 {
-	return(bcd2bin(rtcin(port)));
+	return(bcd2int(rtcin(port)));
 }
 
 /*
@@ -512,9 +523,9 @@ resettodr()
 
 	tm -= tz.tz_minuteswest * 60 + adjkerntz;
 
-	writertc(RTC_SEC, bin2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
-	writertc(RTC_MIN, bin2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
-	writertc(RTC_HRS, bin2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
+	writertc(RTC_SEC, int2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
+	writertc(RTC_MIN, int2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
+	writertc(RTC_HRS, int2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
 
 	/* We have now the days	since 01-01-1970 in tm */
 	writertc(RTC_WDAY, (tm+4)%7);			/* Write back Weekday */
@@ -525,10 +536,10 @@ resettodr()
 
 	/* Now we have the years in y and the day-of-the-year in tm */
 #ifdef USE_RTC_CENTURY
-	writertc(RTC_YEAR, bin2bcd(y%100));		/* Write back Year    */
-	writertc(RTC_CENTURY, bin2bcd(y/100));		/* ... and Century    */
+	writertc(RTC_YEAR, int2bcd(y%100));		/* Write back Year    */
+	writertc(RTC_CENTURY, int2bcd(y/100));		/* ... and Century    */
 #else
-	writertc(RTC_YEAR, bin2bcd(y - 1900));          /* Write back Year    */
+	writertc(RTC_YEAR, int2bcd(y - 1900));          /* Write back Year    */
 #endif
 	for (m = 0; ; m++) {
 		int ml;
@@ -541,8 +552,8 @@ resettodr()
 		tm -= ml;
 	}
 
-	writertc(RTC_MONTH, bin2bcd(m + 1));            /* Write back Month   */
-	writertc(RTC_DAY, bin2bcd(tm + 1));             /* Write back Month Day */
+	writertc(RTC_MONTH, int2bcd(m + 1));            /* Write back Month   */
+	writertc(RTC_DAY, int2bcd(tm + 1));             /* Write back Month Day */
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, RTCSB_24HR | RTCSB_PINTR);
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c
index be0284049f0..9dba18b0e60 100644
--- a/sys/isa/atrtc.c
+++ b/sys/isa/atrtc.c
@@ -398,18 +398,29 @@ sysbeep(int pitch, int period)
 /*
  * RTC support routines
  */
+static int
+bcd2int(int bcd)
+{
+	return(bcd/16 *	10 + bcd%16);
+}
 
-static __inline void
+static int
+int2bcd(int dez)
+{
+	return(dez/10 *	16 + dez%10);
+}
+
+static inline void
 writertc(u_char reg, u_char val)
 {
 	outb(IO_RTC, reg);
 	outb(IO_RTC + 1, val);
 }
 
-static __inline int
+static int
 readrtc(int port)
 {
-	return(bcd2bin(rtcin(port)));
+	return(bcd2int(rtcin(port)));
 }
 
 /*
@@ -512,9 +523,9 @@ resettodr()
 
 	tm -= tz.tz_minuteswest * 60 + adjkerntz;
 
-	writertc(RTC_SEC, bin2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
-	writertc(RTC_MIN, bin2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
-	writertc(RTC_HRS, bin2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
+	writertc(RTC_SEC, int2bcd(tm%60)); tm /= 60;	/* Write back Seconds */
+	writertc(RTC_MIN, int2bcd(tm%60)); tm /= 60;	/* Write back Minutes */
+	writertc(RTC_HRS, int2bcd(tm%24)); tm /= 24;	/* Write back Hours   */
 
 	/* We have now the days	since 01-01-1970 in tm */
 	writertc(RTC_WDAY, (tm+4)%7);			/* Write back Weekday */
@@ -525,10 +536,10 @@ resettodr()
 
 	/* Now we have the years in y and the day-of-the-year in tm */
 #ifdef USE_RTC_CENTURY
-	writertc(RTC_YEAR, bin2bcd(y%100));		/* Write back Year    */
-	writertc(RTC_CENTURY, bin2bcd(y/100));		/* ... and Century    */
+	writertc(RTC_YEAR, int2bcd(y%100));		/* Write back Year    */
+	writertc(RTC_CENTURY, int2bcd(y/100));		/* ... and Century    */
 #else
-	writertc(RTC_YEAR, bin2bcd(y - 1900));          /* Write back Year    */
+	writertc(RTC_YEAR, int2bcd(y - 1900));          /* Write back Year    */
 #endif
 	for (m = 0; ; m++) {
 		int ml;
@@ -541,8 +552,8 @@ resettodr()
 		tm -= ml;
 	}
 
-	writertc(RTC_MONTH, bin2bcd(m + 1));            /* Write back Month   */
-	writertc(RTC_DAY, bin2bcd(tm + 1));             /* Write back Month Day */
+	writertc(RTC_MONTH, int2bcd(m + 1));            /* Write back Month   */
+	writertc(RTC_DAY, int2bcd(tm + 1));             /* Write back Month Day */
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, RTCSB_24HR | RTCSB_PINTR);