CTL_AUTO_RELEASE
outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL );
outw(CTL_AUTO_RELEASE | 0x0000, ioaddr + CONTROL);
outw(CTL_AUTO_RELEASE | CTL_TE_ENABLE | CTL_CR_ENABLE,
outw(CTL_AUTO_RELEASE | CTL_TE_ENABLE | CTL_CR_ENABLE,
ctl |= CTL_AUTO_RELEASE;
ctl &= ~CTL_AUTO_RELEASE;