I've discovered some strange thing in the Microchip programming specs for the 16C84.. i hope someone at Microchip is reading this message and can answer my questions.. and maybe correect the manual. 2.3.1.8 Point 1: "Load Data All 1's" ... ? for Program or Data memory? Point 2: Bulk Erase User Memory does not exists.. maybe is Bulk Erase Program Memory? Next paragraph is repeated two times... They speak about a test memory ... ? maybe the configuration memory? Or the configuration memory but extended also to the data memory (0x2100) ? 2.3.1.9 Point 1: same as paragraph 2.3.1.8 -- - *Alex* - (azummo@ita.flashnet.it) (http://freepage.logicom.it/azummo/)