GN_Pdt, Convert an internal date to an ASCII string

IN:
     HL = 0,1,2 not allowed
     HL > 255, HL points to 3 byte internal date (low byte first)
     DE = 0, result to stream IX
     DE = 1, result to filter IX
     DE = 2, not allowed
     DE > 255, result written at (DE)

     A0 = 1, enable zero blanking
     A1 = 1, output leading space
     A2 = 1, output trailing space
     A3 = 1, force American format (day, month, date, year)
     A4 = 1, force European format (day, date, month year)
     A5 = 1, force C as inter-field delimiter
     A6 = 1, date suffix output
     A7 = 1, century output

     B0 = 1, output text month, reset for numeric month
     B1 = 1, output expanded day, reset for compressed day
     B2 = 1, output expanded month, reset for numeric month
     B3 = 1, output day, reset for no day
     B4 = 1, output AD or BC, reset for no AD/BC
	 B5 - B7, undefined

     C = optional inter-field delimiter (A5 = 1)
     IX = optional output handle (if DE = 0,1)

OUT, if call successful:
     Fc = 0
     DE = points to next character after result (if DE(in) > 255), else
     contains number of characters written to destination.
OUT, if call failed:
     Fc = 1
     A = error code:
          RC_BAD ($04), bad parameters
          RC_ROOM ($07), no room to perform conversion

Registers changed after return:
     ..BC..HL/IXIY same
     AF..DE../.... different