Register parameters

RST 20H, DEFW $1809

 IN:
     DE = 0, not allowed.
     DE = 1, not allowed.
     DE = 2, return system date in ABC.
     DE > 255, pointer to write machine date at (DE).

OUT:
     If DE(in)>255 then DE = DE(in) + 3; ABC = ABC(in)
     If DE(in)<255 then DE = DE(in); ABC = result

Registers changed after return:
     ......../IXIY same
     AFBCDEHL/.... different

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_Pdt, write internal date as ASCII string
GN_Pmd, put (set) machine date

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