Re: MD: [Fwd: Recording from minidisk to CD]
"Jason K. Fritcher" wrote: The ISA bus is typically chained to the end of the PCI bus with a PCI-ISA bridge. Basically the ISA bus appears as just another device to the PCI bus. Anything that consumes all of the PCI buses bandwidth for a long period of time, or anything device that stays in its IRQ handler for too long will disrupt communication on the bus. The AGP bus is typically runs parallel to the PCI bus, so they don't affect each other. Dont count on it :( Anything that is labelled as a "Winmodem" or compatible with only MS Windows. winmodems cover both software (the bad ones) and controlerless ones (the ok ones) the Lucent winmodem is pretty darn good, I actually have less cpu utilization with that then my old external, and it never disconnects. The conexiont soft 56 flex, or the HSP chipped modems are the ones to avoid. Only the winmodem will suffer from bus disruptions. The modem now relies on the system's cpu to generate the carrier signal that keeps the modems connected. If a bus disruption occurs, thay carrier gets disrupted and the modems disconnect. Basically in a software modem, the modem signal is made by the software, and carried over the bus just like audio, so anything that messes up your sound will mess up the modem signal. The remote modem will hear the jumpy sound as noise and most likly disconnect because of it. controlerless modems (conexiant HCF and LT winmodems) carry data over the bus, but its the raw data thats getting sent along with instructions for the DSP on what to do. Hardware modems send the instructions and data as one stream like it was going to a serial port - this is less efficiant, and means that while you are online you cannot send commands to the modem. Some drivers for the controlerless ones will let you see line conditions and speeds etc while you are connected, whereas the hardware ones make you wait till you are disconnected to see why. With a normal modem, all of the signal processing and carrier generation is done on the modem itself and all the system cpu has to do is send the modem the data to transfer. If a bus disruption occurs, the modems stay connected, but stop transmitting or receiving data. Generally they will have a comm overrun where the computer misses out on data, PPP will take care of that and request a retransmition. but in any case, if the sound is disrupted when scrolling, then its a video driver issue and you should not let up untill your card vendor admits there problem. -- Richard - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: [Fwd: Recording from minidisk to CD]
On Mon, 11 Oct 1999, Magic wrote: Richard Malcolm-Smith wrote: Magic wrote: does anyone have an idea what could be going wrong with this set up? Yes. Your expert knows sod-all about the PCI bus and video cards. This is a common problem with PCI sound cards, and is actually caused by video card drivers. It also aflicts ISA cards. It does? How very annoying... I thought it was just the PCI bus that was effected. I nthat case, could a similar problem be caused by an AGP card? The ISA bus is typically chained to the end of the PCI bus with a PCI-ISA bridge. Basically the ISA bus appears as just another device to the PCI bus. Anything that consumes all of the PCI buses bandwidth for a long period of time, or anything device that stays in its IRQ handler for too long will disrupt communication on the bus. The AGP bus is typically runs parallel to the PCI bus, so they don't affect each other. And software modems, which will usually disconnect. After all they are only a fancy soundcard that connects to a phone line. How do you tell the difference between a hardware and software modem? Will they both suffer? Anything that is labelled as a "Winmodem" or compatible with only MS Windows. Only the winmodem will suffer from bus disruptions. The modem now relies on the system's cpu to generate the carrier signal that keeps the modems connected. If a bus disruption occurs, thay carrier gets disrupted and the modems disconnect. With a normal modem, all of the signal processing and carrier generation is done on the modem itself and all the system cpu has to do is send the modem the data to transfer. If a bus disruption occurs, the modems stay connected, but stop transmitting or receiving data. -- Jason K. Fritcher [EMAIL PROTECTED] - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: [Fwd: Recording from minidisk to CD]
"J. Coon" wrote: does anyone have an idea what could be going wrong with this set up? Yes. Your expert knows sod-all about the PCI bus and video cards. This is a common problem with PCI sound cards, and is actually caused by video card drivers. The video card driver hogs the PCI bus (the data lines along which the various cards in your PC communicate with CPU and memory) for longer than it should do. The result is that all other cards in the system suffer timing problems. The only time you notice this is on output devices such as sound cards. THe solution isn't very simple. You can try updating video card drivers, turning down hardware acceleration in the display settings, or as a last resort replacing the video card. Unfortunately manufactureres don't tell you if their drivers hog the PCI bus or not, so you need to find a newsgroup dedicated to video cards and ask for recommendations. Hope this helps! -- Magic Location : Portsmouth, England, UK Homepage : http://www.mattnet.freeserve.co.uk EMail : mailto:[EMAIL PROTECTED] "A book judged by it's cover makes for a very shallow read." - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: [Fwd: Recording from minidisk to CD]
Magic wrote: does anyone have an idea what could be going wrong with this set up? Yes. Your expert knows sod-all about the PCI bus and video cards. This is a common problem with PCI sound cards, and is actually caused by video card drivers. It also aflicts ISA cards. The video card driver hogs the PCI bus (the data lines along which the various cards in your PC communicate with CPU and memory) for longer than it should do. The result is that all other cards in the system suffer timing problems. It is a result of the drivers sending more commands to the card then its input que can handle, meaning that the last command sits on the bus tying it up untill there is room in the card for accept it. All that for maybe 1 or 2 fps more. The only time you notice this is on output devices such as sound cards. And software modems, which will usually disconnect. After all they are only a fancy soundcard that connects to a phone line. THe solution isn't very simple. You can try updating video card drivers, turning down hardware acceleration in the display settings, or as a last resort replacing the video card. Unfortunately manufactureres don't tell you if their drivers hog the PCI bus or not, so you need to find a newsgroup dedicated to video cards and ask for recommendations. No, Nag the video card vendor about it not being PCI compliant. Its great when both sound and video are made by the same people (Diamond) - they cant pass the buck. -- Richard - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: [Fwd: Recording from minidisk to CD]
Richard Malcolm-Smith wrote: Magic wrote: does anyone have an idea what could be going wrong with this set up? Yes. Your expert knows sod-all about the PCI bus and video cards. This is a common problem with PCI sound cards, and is actually caused by video card drivers. It also aflicts ISA cards. It does? How very annoying... I thought it was just the PCI bus that was effected. I nthat case, could a similar problem be caused by an AGP card? The video card driver hogs the PCI bus (the data lines along which the various cards in your PC communicate with CPU and memory) for longer than it should do. The result is that all other cards in the system suffer timing problems. It is a result of the drivers sending more commands to the card then its input que can handle, meaning that the last command sits on the bus tying it up untill there is room in the card for accept it. All that for maybe 1 or 2 fps more. Yep, that's what happens. Sorry, I was trying to keep it as simple as possible. The only time you notice this is on output devices such as sound cards. And software modems, which will usually disconnect. After all they are only a fancy soundcard that connects to a phone line. How do you tell the difference between a hardware and software modem? Will they both suffer? THe solution isn't very simple. You can try updating video card drivers, turning down hardware acceleration in the display settings, or as a last resort replacing the video card. Unfortunately manufactureres don't tell you if their drivers hog the PCI bus or not, so you need to find a newsgroup dedicated to video cards and ask for recommendations. No, Nag the video card vendor about it not being PCI compliant. Its great when both sound and video are made by the same people (Diamond) - they cant pass the buck. But if you don't know much about PCI hardware, how can you argue this convincingly? THey can spout of any old nonsense about timings and specifications and you wouldn't know any different unless you know a lot about the internal systems in a PC. -- Magic Location : Portsmouth, England, UK Homepage : http://www.mattnet.freeserve.co.uk EMail : mailto:[EMAIL PROTECTED] "A book judged by it's cover makes for a very shallow read." - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: [Fwd: Recording from minidisk to CD]
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 * Magic [EMAIL PROTECTED] on Sun, 10 Oct 1999 | It does? How very annoying... I thought it was just the PCI bus that was | effected. I nthat case, could a similar problem be caused by an AGP card? Anything that requires interrupts on a "PC compatible" architecture will experience this. The IRQtune FAQ at URL:http://www.best.com/~cae/irqtune/ describes exactly what is happening. The short version is that sound and serial devices are given *very* low priority, when they should be given very high priority because they are real-time devices. Depending on the OS you are using and the underlying hardware, you might be able to adjust the priority of real-time devices... or not. -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.0d (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE4AU58gl+vIlSVSNkRAkP/AJ4g9THh77goqH9nEuun+hc+Kfc3PACfSx+z 45eu+W+eGNmyJ1t5goKtQD8= =yp8E -END PGP SIGNATURE- -- Rat [EMAIL PROTECTED]\ If Happy Fun Ball begins to smoke, get Minion of Nathan - Nathan says Hi! \ away immediately. Seek shelter and cover PGP Key: at a key server near you! \ head. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
