I'd say it has nothing to do with the slot, since th ISA bus is simply a PCI to ISA bridge, meaning any ISA signals go through the PCI buss before they reach the ISA bus. If anything it's a driver or OS issue (winmodem, bad drivers, bad OS handling of PCI stuff, etc) -Adam Jim wrote: > "The ping issue has nothing to do with the PCI > slot per se" > >I've got some guys reporting that ping times to a local >node from an ISA-based modem are always half those of of >a PCI-based modem. > >I'm going to check with these guys and see whether their >PCI-based modem was a brainless Win-modem or not ... > >RF Jim > > > >----- Original Message ----- >From: "Michael Rigby-Jones" >To: >Sent: Wednesday, September 11, 2002 11:07 AM >Subject: Re: [OT]: 56k modem at 250k > > > > >>>-----Original Message----- >>>From: Jim [SMTP:jvpoll@DALLAS.NET] >>>Sent: Wednesday, September 11, 2002 4:57 PM >>>To: PICLIST@MITVMA.MIT.EDU >>>Subject: Re: [OT]: 56k modem at 250k >>> >>>#1 ---- >>> >>>Does anybody know about the compression that can be agreed >>>upon during an LCP (Link Control Protocol) negotiation on >>>a PPP link between two modems, compression like Van Jacobson >>>Compressed TCP/IP? >>> >>>May I guess that this compression is done my the main CPU >>>in a Winmodem - and by the on-board processor on a full >>>US-Robotics DOS-capable FAX-Modem? >>> >>>#2 ---- >>> >>>It has also been shown that PCI modem ping-times are like >>>100 ms longer that the same modem but in an ISA slot - >>>documentation of this item upon request ... >>> >>>(I know some Gamers that have caught onto this little item.) >>> >>>RF Jim >>> >>> >>> >>The ping issue has nothing to do with the PCI slot per se, it's just that >>the overwhelming majority of PCI based modems are either "softmodems" and >>use the host CPU for virtualy all DSP work, or are at least >> >> >"controllerless" > > >>which puts somewhat less overhead on the CPU, but still far more than a >>"proper" hardware modem. Most (but not all) ISA based modems were purely >>hardware solutions, effectively the guts of an external modem and a UART >> >> >on > > >>the same board. USB modems are also nearly always controllerless. The >> >> >only > > >>way to guarantee to get a decent modem (which will also work with Linux >> >> >etc) > > >>is to buy an external one that uses a proper serial port connection. >> >>Regards >> >>Mike >> >> >> > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. > > > > > > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.