Thanks for the information.
My stepper has 24 steps each of 15 deg. Drive voltage = 24 volts, has 6 wires coming out of it.

i read a tutorial here http://www.dprg.org/tutorials/1997-07a/ to use 8051 and uln2803 to drive a stepper but it doesn't not tell anything about the code in mcu.

Regards

pete