Hi All
Help required to fix Checksum on a Utility rom Please.
Dropbox - UTILITY.ROM.zip (https://www.dropbox.com/s/izql3gdisk60cwr/UTILITY.ROM.zip?dl=0)
SORTED, The ROM is Faulty.
Thanks Ray
You basically add the values from &C000 to &FFFE and keep the result in 8 bit. This byte then gets written to &FFFF.
Or you can use ROManager 2.14 to adjust the check-sum using the Test-ROM option.
@TFM (http://www.cpcwiki.eu/forum/index.php?action=profile;u=179)
Thanks for the info, I did it the hard way
I used MegaFlash Romanager 464/664 Ver 1.45 (TFM)
To Test the rom, Update checksum, Dump rom to disk.
Compared Rom1 Faulty CheckSum with Rom1 fixed CheckSum
Found the Byte that had been modified at &FFFF.
Thanks Ray