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apple/macrtc.cpp: Don't cache the time reference, it's somehow different for different timezones. (GitHub #11298) [R. Belmont]

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This commit is contained in:
arbee 2023-05-31 21:28:01 -04:00
parent 9f661e567c
commit ca881dd7e0
1 changed files with 11 additions and 4 deletions
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15
src/mame/apple/macrtc.cpp
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@ -45,8 +45,6 @@ enum
RTC_STATE_XPWRITE
};
static constexpr uint32_t mac_reference = 0x83da95d0; // Seconds from January 1, 1904, 12:00:00 to when POSIX time starts
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
@ -153,7 +151,7 @@ TIMER_CALLBACK_MEMBER(rtc3430042_device::half_seconds_tick)
void rtc3430042_device::rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second)
{
struct tm cur_time;
struct tm cur_time, macref;
uint32_t seconds;
if (m_time_was_set)
@ -171,7 +169,16 @@ void rtc3430042_device::rtc_clock_updated(int year, int month, int day, int day_
cur_time.tm_year = year+100; // assumes post-2000 current system time
cur_time.tm_isdst = 0;
seconds = (uint32_t)((uint32_t)mktime(&cur_time) - mac_reference);
macref.tm_sec = 0;
macref.tm_min = 0;
macref.tm_hour = 0;
macref.tm_mday = 1;
macref.tm_mon = 0;
macref.tm_year = 4;
macref.tm_isdst = 0;
uint32_t ref = (uint32_t)mktime(&macref);
seconds = (uint32_t)((uint32_t)mktime(&cur_time) - ref);
}
LOG("second count 0x%lX\n", (unsigned long) seconds);