[SunHELP] How to substract hexadecimal numbers in sh script

[Gurcan ERIM]

Hi,

I need to substract to hexadecimal numbers. I can do this with bc but it
looks for uppercase letters. (A,B,C,D,E,F) but my source file has numbers
with lowercase.=20

Is it possible to implement lowercase letters as hexadecimal?
Or
How can i change lowercase to upper, any practical suggest, like using sed,
awk, or printf etc.?

Thanks.

G=FCrcan





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