READ CALENDAR
BIOSF_READ_CALENDAR ($C0045C)
Reads the uPD4990 calendar and sets values in RAM. MVS only. Sets in BCD:
- BIOS_YEAR ($10FDD2): last 2 digits of year
- BIOS_MONTH ($10FDD3): 1~12
- BIOS_DAY ($10FDD4): 1~31
- BIOS_WEEKDAY ($10FDD5): Sunday = 0... Saturday = 6
- BIOS_HOUR ($10FDD6): 0~23
- BIOS_MINUTE ($10FDD7): 0~59
- BIOS_SECOND ($10FDD8): 0~59