INTERNAL MODEM

Asus was providing the Windows driver for the Conexant 56K modem on their download site, but it's gone now. Although it's possible to hack another Conexant drive to make it work on the Eee (more below).

The modem card can be found on various Dell, Acer, and Sony laptops. On Ebay the Conexant card can be found under these model numbers:

• Conexant 56K Modem RD02-D110
• M5804 (Dell part number)

To install the modem, two wires from the internal header has to be run down to the MDC slot. I found a suitable connector and leads with the correct 1.25 mm pitch for the header socket. Although I didn't find a connector for the MDC-side. I had to solder the wires directly onto the back of the connector.

After stripping the wires, I had to figure out which wire was Tx and Rx. The easiest way was to just connect them blindly and test if I could get a connection. Luckly I did on first try, the correct Tx and Rx points are shown below.

This was a pretty easy install. Just hooking up the wires and pressing the modem card onto the MDC header on the motherboard.

And the height shouldn't be a problem since the spot was made to fit a modem card from the get-go.

Notice that only the older 8804 BIOS version has support for the modem, Asus removed the modem functionality on all newer revisions of the BIOS.

To get the modem to install in Windows XP, I had to go through several modem drivers before concluding that every manufacturer made their own cards and drivers to fit a specific laptop series. The reason I guess is to stop people going to the competitors driver download page to get the modem driver.

After finding a driver that fitted the description of the RD02-D110, I figured that I had to change the INF-file to make the Windows devices wizard recognize the modem. Fortunately a Fujitsu-Siemens Amilo Xa2528 seems to use the same driver I needed. I hacked/modified the INF-file by removing the string &SUBSYS_14F10001 from the ControlFlags, HSF_MODEM.NTx86.5.1, and Strings-sections. Also make sure that the VEN and DEV variables are the same as in the device manager, e.g 14F1 and 2BFA respectively.

• Download the original modem driver
• Download the hacked driver

Once modified, open device manager and try to install the modem driver. It should recognize the modem this time and should show up as HDAUDIO Soft Data Fax Modem with SMARTCP.

 

 

Source: http://beta.ivancover.com/wiki/index.php/Eee_PC_Internal_Upgrades

 

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