ASY_MCR_OUT2
asy_put(asy, ASY_MCR, asy->asy_mcr | ASY_MCR_OUT2);
asy_put(asy, ASY_MCR, ASY_MCR_OUT2);
(asy->asy_mcr & ASY_MCR_RTS) | ASY_MCR_OUT2);
asy_put(asy, ASY_MCR, asy->asy_mcr | ASY_MCR_OUT2);
(ASY_MCR_DTR | ASY_MCR_RTS | ASY_MCR_OUT1 | ASY_MCR_OUT2 | ASY_MCR_LOOP)