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Old 03-04-2004, 04:03 AM   #1
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Registered: Feb 2004
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kernel module for hercules graphic card

i had a module (char device) that worked well under kernel 2.0
when i upgraded to 2.2 it does not work anymore.
i read about ioremap for direct memory access, and i
can already display a char, but only inside the init routine.
the documentation i found about writing char devices was
not sufficcient ;(

do you know any sources of documentation ?
Old 03-04-2004, 04:38 AM   #2
Registered: Feb 2004
Location: Bangalore
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try there you will get a book writing kernel modules. it might be helpful to you.
Old 03-04-2004, 04:00 PM   #3
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i think "struct file_operations" was changed from 2.0 to 2.2 but i cant find the header.
Old 03-04-2004, 04:39 PM   #4
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ok got it finally running. wondering about some new grey hairs i can see my messagelog on that old green monitor


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