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Hello everyone,
I got some AT89C51RD2 chips that had their original bootloaders overwritten. Now I can't use FLIP to reprogram them.
AFAIK, now I need a parallel programmer to erase the chips and reflash the original bootloader.
So, I have two questions:
1) Where can I get the bootloader hex file for this specific chip?
2) Which parallel programmer should I use? I can build it if I can get the schematics.
Thank you all in advance!
Eduardo