summaryrefslogtreecommitdiff
path: root/src/include/pc80
diff options
context:
space:
mode:
Diffstat (limited to 'src/include/pc80')
-rw-r--r--src/include/pc80/mc146818rtc.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h
index a916761222..61b522ca74 100644
--- a/src/include/pc80/mc146818rtc.h
+++ b/src/include/pc80/mc146818rtc.h
@@ -63,6 +63,8 @@
# define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */
# define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */
+#define RTC_TO_BCD(value) (((value / 10) << 4) | (value % 10))
+
/**********************************************************************/
#define RTC_INTR_FLAGS RTC_REG_C
/* caution - cleared by read */