def to_fixed(stype):
    """ Returns the instruction sequence for converting the given
    type stored in DE,HL to fixed DE,HL.
    """
    output = []  # List of instructions

    if is_int_type(stype):
        output = to_word(stype)
        output.append('ex de, hl')
        output.append('ld hl, 0')  # 'Truncate' the fixed point
    elif stype == 'f':
        output.append('call __FTOF16REG')
        REQUIRES.add('ftof16reg.asm')

    return output
Returns the instruction sequence for converting the given
    type stored in DE,HL to fixed DE,HL.