COC

on Michael Vorburger's Personal Homepage
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PROJECT NAME

COC (checksum on code)

DATE & STATUS

Click here for more information about this project

during 1993

This project was published in the computer magazine "ATARI ST Computer" somewhen in 1994; I don't exactly remember which issue.

DESCRIPTION

The goal was to implement a C library which calculates a checksum of the program. The idea was to detect manipulations caused by viruses. A binding to use the C library from Pascal was also provided.

Because I chose to use the image in memory, the relocation done by the OS had to be "undone" for the calculations. (By reading the relocation table; from disk actually... ;-)

TECHNOLOGIES

low-level C program
Atari OS (TOS) executable file format and relocation info

LOOKING BACK

My first publication; and actually the reason why I started learning C. At the end of all the struggles with arrays and pointers etc. I was pretty fit in C. ;-) It would not remain my last C program...

MORE INFORMATION

COC Artikel
COC C-Source
COC Pascal Binding

 

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