In Linux you need to have the appropriate module loaded in order to access the devices it covers (you said you use Windows, in Windows you need drivers to access hardware - its the same in linux only you need to use modules or have support compiled into your kernel, but thats the topic of a different thread). I can see from the output of your
lsmod (a simple command that displays the currently loaded modules) that you do not have the tulip or the sis900 modules loaded.
In order to load the modules type the command (as root):
modprobe tulip
this would load the tulip module, to load the sis900 try:
modprobe sis900
My suggestion would be to load one module (start with tulip) and then try running Mandrake's internet connection wizard (or whatever its called). If loading the tulip module doesn't show your network device as one of the choices in the wizard try removing the module with:
rmmod tulip
and then try loading the sis900 module and trying the wizard again.
If you are able to load an appropriate module that allows you to configure your internet card then you will need to instruct Mandrake to load this module everytime it boots, or you will have to load the module manually each time you want to use the internet.
To have modules loaded at boot time you need to simply add their name to the last line in your /etc/modprobe.preload file (**keep in mind /etc/modprobe.preload is the place to put modules to load at boot in 2.5.x kernels and above, /etc/modules.conf is for 2.4.x kernels**), also editing this file must be done as root.
For example if the tulip module is the module you need to use then your /etc/modprobe.preload should look like this:
# /etc/modprobe.preload: kernel modules to load at boot time.
#
# This file should contain the names of kernel modules that are
# to be loaded at boot time, one per line. Comments begin with
# a `#', and everything on the line after them are ignored.
# this file is for module-init-tools (kernel 2.5 and above) ONLY
# for old kernel use /etc/modules
scsi_hostadapter
sis-agp
tulip
If you still can't get the wizard to recognize your card then post back and we can manually write a configuration file. If this does work post back with any further info that you think may help others dealing with the same problem. And of course - good luck