hello,
i am trying to interfacing between 89c51 and adc0808 serially using rs232 but can any one givr me the asm code for adc0808 and 89c51 interfacing code.
I think you must have mis-read your homework assignment.
The adc0808 has a parallel interface - not serial:
www.ti.com/.../adc0808-n.pdf
"can any one givr me the asm code"
Nobody is going to do your home work for you.