GN_Gmd, Get (read) the current machine system date in internal format
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