static void didaktik_tr_write( libspectrum_word port GCC_UNUSED, libspectrum_byte b ) { wd_fdc_tr_write( didaktik_fdc, b ); }
static void plusd_tr_write( libspectrum_word port GCC_UNUSED, libspectrum_byte b ) { wd_fdc_tr_write( plusd_fdc, b ); }