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[Qemu-devel] [PATCH 1/4] rtc: fix 12-hour mode
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 1/4] rtc: fix 12-hour mode |
Date: |
Mon, 21 Nov 2011 19:00:28 +0100 |
Hours in 12-hour mode are in the 1-12 range, not 0-11.
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/mc146818rtc.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
index 2aaca2f..14c8cb9 100644
--- a/hw/mc146818rtc.c
+++ b/hw/mc146818rtc.c
@@ -296,9 +296,11 @@ static void rtc_set_time(RTCState *s)
tm->tm_sec = rtc_from_bcd(s, s->cmos_data[RTC_SECONDS]);
tm->tm_min = rtc_from_bcd(s, s->cmos_data[RTC_MINUTES]);
tm->tm_hour = rtc_from_bcd(s, s->cmos_data[RTC_HOURS] & 0x7f);
- if (!(s->cmos_data[RTC_REG_B] & REG_B_24H) &&
- (s->cmos_data[RTC_HOURS] & 0x80)) {
- tm->tm_hour += 12;
+ if (!(s->cmos_data[RTC_REG_B] & REG_B_24H)) {
+ tm->tm_hour %= 12;
+ if (s->cmos_data[RTC_HOURS] & 0x80) {
+ tm->tm_hour += 12;
+ }
}
tm->tm_wday = rtc_from_bcd(s, s->cmos_data[RTC_DAY_OF_WEEK]) - 1;
tm->tm_mday = rtc_from_bcd(s, s->cmos_data[RTC_DAY_OF_MONTH]);
@@ -320,7 +324,8 @@ static void rtc_copy_date(RTCState *s)
s->cmos_data[RTC_HOURS] = rtc_to_bcd(s, tm->tm_hour);
} else {
/* 12 hour format */
- s->cmos_data[RTC_HOURS] = rtc_to_bcd(s, tm->tm_hour % 12);
+ int h = (tm->tm_hour % 12) ? tm->tm_hour % 12 : 12;
+ s->cmos_data[RTC_HOURS] = rtc_to_bcd(s, h);
if (tm->tm_hour >= 12)
s->cmos_data[RTC_HOURS] |= 0x80;
}
--
1.7.7.1