Date: Sat, 23 Nov 1996 02:40:35 -0800 (PST) From: brian@mediacity.com To: dwhite@resnet.uoregon.edu Cc: freebsd-questions@freebsd.org Subject: Re: Hayes ESP and interrupt-level buffer overflows Message-ID: <19961123104035.17379.qmail@mediacity.com> In-Reply-To: <Pine.BSI.3.94.961122134329.1184J-100000@gdi.uoregon.edu> from Doug White at "Nov 22, 96 01:44:12 pm"
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Brian Litzinger wrote: > > I have a Hayes ESP card hooked to as Motorola BSPro running at 230400. > > ... > > For the most part things work, but when I ftp stuff, I get > > sio2: X more interrupt-level buffer overflows (total xxx), Doug White wrote: > The ESP isn't able to keep up with 57600. Try dropping to 38400. Since the ESP has 1024 byte FIFOs with the RTS/CTS handshaking hardwired to the FIFO levels rather than under the control of the CPU, and is rated for 921600 operation it seems unlikely that the ESP is the problem. Changing TTYHOG to 4096 in sys/sys/tty.h, and RS_IBUFSIZE to 1024 in sys/i386/isa/sio.c cleaned the problem up for me. -- Brian Litzinger Powered by FreeBSD <brian@mediacity.com> http[s]://www.mpress.com
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