Date: Tue, 21 Jan 1997 12:01:55 -0500 From: Luoqi Chen <luoqi@watermarkgroup.com> To: Terry Lambert <terry@lambert.org> Cc: freebsd-hackers@freebsd.org Subject: Re: My sportster internal modem doesn't work after switched to 2.2-BETA Message-ID: <32E4F67C.343F@watermarkgroup.com> References: <199701172052.NAA09015@phaeton.artisoft.com>
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Terry Lambert wrote: > > > A few days after I switched to 2.2-BETA, my internal modem stopped > > working. It can still dial and connect at 28800, and can read correctly, > > but outputs garbage characters. > > Probably you are using the wrong parity. Check your parity settings on > the port, which are set by your communications software (ie: they are > not permanent settings). > After some poking around, I found that the if I sent multiple bytes to the modem, some would get lost. So I went to sio.c and changed com->tx_fifo_size to 1 from 16, and everything works fine now. But I am still wondering if this is a problem with the modem, or with the software. It seems that NT is doing the same, sending no more than one byte at a time. This is not a satisfactory solution, the output FIFO is underutilized and CPU is servicing 16 times more interrupts. > > Terry Lambert > terry@lambert.org > --- > Any opinions in this posting are my own and not those of my present > or previous employers. Thanks for your help. -lq
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