Hello. I was reading in one of my assembly books that INT 33h is not a DOS or BIOS interrupt. It is an interrupt that is part of a memory resident program. This was a confirmation for me because I never found anything that said if INT 33h was a DOS or BIOS interrupt anyway, so I was never sure. It also said it would only cover INT 33h, and not the lower level mouse control. As it turns out, I need the lower level mouse programming abilities, because I will have no mouse driver, I want to write my own. So can anyone give me any resources or information on the very low level mouse programming (non INT 33h), that does not use any sort of DOS functions what so ever (I have no DOS, or any drivers, or libs to work with)? Thanks for any help you can give me. It''s appreciated. Regards. I am not worthy of a sig!