[rtl] RT domain, non RT domain

[erwin.verhulst@philips.com]

Hi,

I'm new with RT-Linux, infact I haven't programmed anything yet with Linux or RT-Linux at all. so forgive me if the question is a bit straight forward.

I'm trying to develop a program for a Cruise Control system. I want to communicate with the CC hardware trough an I/O card or Parallel port.

I'm struggling with the fact that there are two kernels.  One is Linux (non RT) and the other RTLinux (RT). I figured that the control of the I/O card or parallel port must be a loadable module (driver) in the RTLinux kernel and that the Display must run
under X. But, how am I to program this. Can I program this all in one pees, or do I have to separate the Display part and the driver part?

My biggest question is actually, how do I know whether a program is running under RTLinux or Linux.

Can anybody give me a clear picture of how this two kernel stuff actually works.

Many Thanks,

E Verhulst , NL
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