Re: Poor Modem performance
AU,SCOTT CHUONG wrote: Welcome to (10 second pause) ISP Name (10 second pause) Username (10 second pause) etc. I'm running on a old 386-33Mhz with 8megs RAM so is it possible my that probably means, that you dont't have a 16550A uart. try dmesg | less and watch the lines beginning with ttyS00 and ttyS01. hardware isn't fast enough for linux communications programs or have I misconfigured my serial port? Using setserial, I've configured ttyS2 (port where modem resides) at 115200 with the svhi flag. I've also old uart's cannot handle such speed. don't remember exactly at the momement, but wasn't 38400 the limitation for the 16450? changed minicom's settings to 115200 etc. with the fastest settings possible. The modem ran fine under MS-DOS using Qmodem. can you check the working settings of the uart under dos? -- hafi
Re: Poor Modem performance
Hartmut Figge writes: that probably means, that you dont't have a 16550A uart. I have a 386/33 with a 16550A. old uart's cannot handle such speed. However, that is not the symptom. The fact that he sees anything at all indicates that the UART is ok. -- John Hasler [EMAIL PROTECTED] (John Hasler) Dancing Horse Hill Elmwood, WI
Re: Poor Modem performance
Scott Au wrote: After installing and running minicom, I've noticed that my modem, a BOCA ISA 28.8 modem is incredibly slow. Dialing my ISP shows text being received with periodic pauses. From personal experience one possibility is that serial interrupts are not being serviced quickly enough, which can be a big problem with older slower hardware. If too many interrupts are missed then you get serial buffer overflows, dropped packets and delays as TCP/IP tries to recover. There are two things you could try, if this is the case. One is to use irqtune from the hwtools package to boost the serial interrupt priority. The documentation explains what is going on. The other thing, if you have an IDE controller, is to unmask interrupts using 'hdparm -u1'. There are dire warnings attached to that option, so proceed with care. Frank
Re: Poor Modem performance
On Sat, 08 Jan 2000 01:44:00 +0100, Hartmut Figge writes: old uart's cannot handle such speed. don't remember exactly at the momement, but wasn't 38400 the limitation for the 16450? 57600 for a 16450, at least in my old machine. rw -- -- +++ EUnet/[EMAIL PROTECTED], 15.-17.2.'2k, Ebene02/Stand08 +++ - ___ - Robert WaldnerEUnet/AT tech staff // / ___ _/_ -- [EMAIL PROTECTED] RW960-RIPE --- /--- / / / / /___/ / --- ---EUnet EDV-DienstleistungsgesmbH--- -- /___ /___/ / / /___ /_ Diefenbachgasse 35A-1150 Wien - - Tel: +43 1 89933 Fax: +43 1 89933 533
Poor Modem performance
After installing and running minicom, I've noticed that my modem, a BOCA ISA 28.8 modem is incredibly slow. Dialing my ISP shows text being received with periodic pauses. Example: Welcome to (10 second pause) ISP Name (10 second pause) Username (10 second pause) etc. I'm running on a old 386-33Mhz with 8megs RAM so is it possible my hardware isn't fast enough for linux communications programs or have I misconfigured my serial port? Using setserial, I've configured ttyS2 (port where modem resides) at 115200 with the svhi flag. I've also changed minicom's settings to 115200 etc. with the fastest settings possible. The modem ran fine under MS-DOS using Qmodem. Thanks in advance, Scott Au [EMAIL PROTECTED]
Re: Poor Modem performance
Scott Au writes: Welcome to (10 second pause) ISP Name (10 second pause) Username (10 second pause) etc. You almost certainly have an IRQ conflict. Run 'setserial -g /dev/ttyS*' and post the result. -- John Hasler [EMAIL PROTECTED] (John Hasler) Dancing Horse Hill Elmwood, WI
