PC BiosROM Checksum tool v0.1

This tiny program changes the last byte of any file to make the 8-bit checksum (all bytes summed) match 0x00.
The BIOS of any PC requires this in order to execute the ROM.

Running this program with a valid filename that is not write-protected will output either:
"The Checksum is already correct." Or "The Checksum was wrong."


T. Sosnow. <t-sosnow@posteo.com>
Visit QWERTZ-tek at http://qwertz.w10.site/ for my other stuff
April 18, 2025
