A few weeks ago there was considerable activity on Boot Loaders, just a quick question without a lot of detail, just wanted to make sure there wasn't some obvious roadblock. I have a 18F1320 (slave) that has USART going to onboard fiber optic transmitter/receiver (62.5/125um) that is then converted to 2 wire RS-485 with a B&B FOSTC converter and then to a PLC (TRI-PLC T100MD888)(master). The PLC is programmable and online monitoring/control via RS-232 to a PC. I also have a RS-232/RS-485 converter and have talked to the PIC over the Fiber optic/Rs-485 network with a terminal program. I am thinking that either I can use the RS-232/RS-485 converter to use the boot loader (after having programed the 1320 with the boot loader) from a PC, or via the PLC which has been programmed to pass through the 1320 program. Comments? Thanking in advance. :) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist