Member #148947

Member Since: August 31, 2010

Country: United States

  • According to the PIC18F4450 datasheet, the chip has 3 levels of code protection for each of 3 memory blocks (Boot: 0-0x7ff, block1: 0x800-0x1fff & block2: 0x2000-0x3fff) From the posted hex file, it appears the only active code protection is to prevent external readers from accessing block1 and block2. Inter-block read protection is not active. If you still have the devices and want the actual skimmer code it should be a trivial task to add new code in the boot block that will read and dump the contents of block1 and block2.

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