Re: CDC drivers for a modem in windows 98SE

On Fri, Jul 18, 2014 at 7:24 AM, Angelo Di Chello
<[email protected]> wrote:
> Hi,
> I should deliver drivers CDC ECM and ACM for a new modem connected to the
> host pc using usb.
> Actually I already have linux, android, win xp, win 7, and win 8 drivers,
> but I need to deliver also drivers for windows 98 SE.

Why Windows 98SE? That OS has long been obsoleted and unsupported
by Microsoft.

> My question(a request for good suggestion, actually) is what would be the
> best option to have win98SE drivers with these functionalities.
> I am thinking I could port them using libusb-win32(or equivalent) as an
> intermediate layer. Is that feasible in your opinion? Apart from the data
> throughput speed loss because win98SE uses usb 1.0/1,1, do you see any
> other possible functionality loss?

Firstly take note Windows 98SE is no longer supported by libusb-win32
project. So you are on your own. The newer version of libusb-win32
will most likely not work under Windows 98SE. You may have to
use the older version like 0.1.12.2.

Secondly certainly it should be feasible to use libusb-win32 since
it is pretty lower level. But you have to s

> Actually, I have also read somewhere that in the past someone tried to
> modify some sys/inf file to make the usb port behave as a com/modem port on
> win98SE , like in here:
>
> http://forums.codeguru.com/showthread.php?311881.html
>
> , but they also obtained a BSOD when trying a disconnect-connect sequence.
> Maybe this solution is faster, but a bit too "dirty". Am I wrong?
>

The BSOD may have something to do with usbser.sys (USB ACM only) bugs in
Windows 98SE. On the other hand, it is said that host program plays a part as
well. You should probably try this route first if you really need to support
Windows 98SE.



-- 
Xiaofan

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