Thank you for help me

i can find only 8051 and ADC0809. fifo is good idea. My main porpose is 8051 controller with adc. It must work 50 time per second from adc. then 5 minute after it send data to pc. (for why 5 minute in future tree or four device will connect one computer with radio modem.) So while send data by serial port it must work with adc. if you have schematics and routine program please send me

best regards
Bayaraa