While i was composing my previous reply, i have seen 2 more replies besides Xiaofa Chen's reply. I like the style of this mailing list. Experienced engineers talk to newbie engineers for freely (its a place that rarely found on earth ;) and where i like to spend my time) G=F6khan SEVER.. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist