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c
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It then reissues the PATCH AREA= prompt. If the bytes printed for verification begin
with the ones you want to patch, enter the patch in the following form:
I
hhhh hhhh hhhh .•
·1
where:
hhhh hhhh hhhh . . .. are groups of four hexadecimal characters, separated by blanks
The length of the patch must be in the range of 1 to 256 bytes.
The entire patch must be within the boundaries of the sector you
specified. Note that the length of the patch does not have to
equal the value you specified for nnn (the byte verification
count).
If there are no errors, the patch is applied.
The utility responds with:
TFOOll DISK PATCH COMPLETED
The utility issues the completion message which
is
followed by the prompt for the next
patch. The utility continues in this mode until you terminate it by pressing the LOAD
key.
THE OUTPUT YOU RECEIVE
HOW TO HANDLE ERRORS
The output from this utility are prompt messages from the utility and the data for the
requested patch to diskette.
If a recoverable error occurs, the utility prints an appropriate error message and then
reissues the prompt. Recoverable errors are:
• Syntax error in your response to a prompt
• Device at specified device address not a disk
• Sector address not a valid disk address
• Displacement not within the boundaries of the sector you specified
• Number of bytes to be displayed exceeds 256
If
an unrecoverable disk I/O error occurs, the utility abnormally terminates. A terminal
error occurs when an I/O error prevents the utility from printing a message at the
operator station.
Copy, Dump and Patch Programs
6-15
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