This was obtained from HP's web site.
KEY FACT: IF YOU DON'T KNOW
90079 (NO suffix) is the oldest card. It does all the audio processing (pre-AC '97) AND it has an HCF (hardware) modem. THIS card is almost perfectly supported by this (RIP417NA) download. You must find 'genmidi.wsl' somewhere else and point the Win installer to it when it complains that it can't find that name: I THINK that file is in a download that's about 1.3meg -- audiomodemcombo or something like that. Everything else is covered in this download.
This card will show up in your Device Manager as about five devices -- audio, joystick, modem, and a couple more. It has only one entry in 'add/remove software' table: When you uninstall that one, everything goes away.
To install this support, remove any support currently installed, double click the downloaded EXE to extract its files. Know where your Genmidi.wsl file is. Double click the Install.exe that was extracted. When it finishes, restart and Win 98 will loop through discovering and installing the necessary drivers, asking only about the Genmidi file. You should now have proper function for all the stuff this card does.
90079-2 is the 'new' card. It has AC '97 audio, meaning that the digital part of the processing is done on the MOBO so it needs different drivers AND must be used with a computer and OS that does the on MOBO part of the processing. The card only has an audio amp -- no real audio processing.
This card ALSO has an HSF (software) modem. That is, most of the modem's work is done by a program running in the CPU. So again you have to have the right drivers. When looking at driver packages several modules will have either HSF... or HCF... as their name and if a package doesn't have the ones matching your card it's a waste of time to try to install it.
These cards can be distinguished by the Model Number, found near the left middle on the back side -- either 90079 or 90079-2. Also, the HSF (-2) cards lack the modem chip which is an RDSP020, about 3/4" square near the lower right on the front of the card. THE FCC IDs (AND OTHER NUMBERS) ARE IDENTICAL and most people seem to think the two cards are interchangeable, but they are not.
Is there a 90079-1? Probably. And probably it either has AC '97 audio and an HCF modem or 'early' audio and an HSF modem but I've no idea which.
In most cases the best bet will be the card shipped with the machine you're installing it on. EBay is a good source, they're cheap, and you can tell from the picture which is which. It is possible to install the early card on other PCI machines, for example if you are slot-challenged; i have two of 'em on early Dell machines used for old games.
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