Date: Tue, 21 Jan 1997 14:36:30 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: luoqi@watermarkgroup.com (Luoqi Chen) Cc: terry@lambert.org, freebsd-hackers@FreeBSD.ORG Subject: Re: My sportster internal modem doesn't work after switched to 2.2-BETA Message-ID: <199701212136.OAA20084@phaeton.artisoft.com> In-Reply-To: <32E4F67C.343F@watermarkgroup.com> from "Luoqi Chen" at Jan 21, 97 12:01:55 pm
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> 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. Ugh. You need to look at the -questions archives for this one. It has to do with whether or not the UART is broken, and there is a specific list of "OK" parts which you should look for when you buy hardware. Sorry to tell you ythis after you bought hardware... Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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