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GN_Pmd, Put (set) the current machine date

GN_Pmd, Put (set) the current machine date

Mar 01, 2014

Register parameters

RST 20H, DEFW $1C09
IN:
     HL = 0, not allowed
     HL = 1, not allowed
     HL = 2, 3 byte internal date in ABC (A = high byte, C = low byte)
     HL > 255, HL points to 3 byte internal date (low byte first)

OUT, if call successful:
     -
Registers changed after return:
     AFBCDEHL/IXIY same
     ......../.... different 

Notes

The date is used throughout the machine and should only be altered if the user of the machine is fully aware of the fact. Flow sequence: 

  1. Get real time in days/seconds/centiseconds
  2. Reset RTC
  3. Multiply set-days by $011580
  4. Add real seconds
  5. Save new base seconds

Related calls

GN_Dei, convert zoned format date to internal format
GN_Die, convert internal format date to zoned format
GN_Gdt, convert an ASCII string to an internal binary date
GN_Gmd, Get (read) machine date in internal format
GN_Pmt, Put (set) machine time
GN_Pdt, write internal date as ASCII string

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