GN_D16, 16bit unsigned division

RST 20H, DEFW $7409

IN:

     HL = dividend
     DE = divisor

     Fc = 0
     HL = quotient
     DE = remainder

     Fc = 1
     A = error code:
          RC_FAIL ($16), division by zero attempted

     ..BC..../IXIY same
     AF..DEHL/.... different

Bugs:

Related calls:

GN_Gdn, convert an ASCII string to a binary number
GN_M16, 16bit unsigned multiplication
GN_D24, 24bit unsigned division
GN_M24, 24bit unsigned multiplication
GN_Pdn, write number as decimal ASCII string