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Appendices
1) Make a back-up of the original diskette. Work from the back-up diskette.
2) Load the debugger and the A TDISK.OBJ file by entering the command
Debug ATDISK.OBJ <CR>
3) Search for the hexadecimal code sequence B9 64 00 by entering the command:
S CS:O FFFF B9
64 00
<CR>
The debugger should find one occurrence of that sequence and tell you the address
of the first byte of the sequence with a display having the following format:
XXXX: YYYY
where YYYY is the address of the first byte of the
sequence
In the sequence of code B9 64 00, the value 64 must be replaced by value 00 and
the value 00 must be replaced by value 02.
This is done by entering the command:
E CS:YYYY <CR>
The debugger displays the value B9; press the space bar once the debugger
displays the value 64; type in 00, then press the space bar. The debugger will
now display the value 02; type in 01 and press the return key. To make sure that
the patch was properly done, you may display the new code sequence by entering
the command:
D CS:YYYY <CR>
You should now observe the sequence B9 00 02.
4) Search for the hexadecimal sequence of code 3D 00 C8 72 by entering the
command:
S CS: 0 FFFF 3D 00 C8 72 <CR>
The debugger should find TWO occurrences of that sequence and tell you the
address of the first byte of each sequence with a display having the following
format:
AAAA:BBBB
XXXX:YYYY
adaptec
where BBBB and YYYY are the addresses of the
first byte of each occurrence
A-8
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