OSDev.org

I have ported ucos to protected mode and made it run
in the bochs. Because I can not use the BIOS, so I wrote
the VGA driver, but this work is boring, so I want to use
windows driver in my own os, I think if I simulate some
system call(int 20??), I can make it. Would you give me some advice, thank you so much!

The system calls in question are not int 20h etc. but the Windows kernel API. Download the Windows DDK from http://www.microsoft.com/ (can't remember the exact URL but a search there should find it) and read the documentation.

However, supporting Windows drivers will be a lot more difficult than writing your own.

i've been trying to download these drivers devkit, but all i can get is some IIS 404 page ... maybe Microsoft would like me to download them using Windows/IE5 rather than Linux/Mozilla :p

btw, before using such stuff, read *carefully* the EULA so that you don't spend years implementing software that will be illegal because you used the knowlegde micro$oft "gave" you in order to develop a concurrent product ...

I think Microsoft would prefer you to order the DDK on CD instead of downloading it -- they will withdraw the download option soon, if they haven't already done so.

hmm ... and pay $25 to get it, i guess ... and having no rights of using it but for developping a driver for m$ that i won't even be allowed to port to another OS ?? no, thanks ... i prefer focus on Linux drivers if this is how those guys think computing should work >:-(

As far as I know, there's nothing to stop you porting Windows driver source code to other operating systems. There was a rumour of a clause in the Visual C++ EULA that stopped you using it to write code for non-Microsoft operating systems, but I don't think that's anything more than a rumour.

In any case, having seen both Microsoft and Linux driver source, I'd much rather work with Windows drivers than Linux.

Thank you again!
I have disassmblied some video driver, I found that
they have just a little system calls. I think I can do it.
I have wrote a dosloader which can load my os(ported from ucos) in pure dos. My os is compiled in VC6++, so
it is a pe file. The os is running in ring 0 mode and the page mode is enable.

I have written a vxd driver which has 7 system calls
:
VPICD_Physically_Mask
VPICD_Phys_EOI
VPICD_Physically_Unmask
_PageAllocate for PhysAddr
VPICD_Force_Default_Behavior
_PageFree
VPICD_Virtualize_IRQ
these system api is easy to be simulate!!!

Nice! Let us know how you get on with this...