DIGITAL RESEARCH(r) CP/M Plus TM (CP/M Version 3) Operating ...

The PATCH Command CP/M 3 User's Guide
The PATCH Command
Syntax: PATCH filename {typ} {n}
Explanation: The PATCH command displays or installs patch number n to the
CP/M 3 system or CP/M 3 command files.
Only CP/M 3 system files of filetype COM, PRL, or SPR can be patched
with the PATCH command. If the typ option is not specified, the PATCH
utility looks for a file with a filetype of COM.
The patch number n must be between 1 and 32 inclusive.
Examples: A > PATCH SHOW 2
The preceding command patches the system SHOW.COM file with
patch number 2. The system displays the followin question:
Do you want to indicate that Patch #2
ha been installed for SHOW.COM? Y
If the patch is successful, the system displays the message:
Patch Installed
If the patch is not successful, the system displays the following message:
Patch not Installed
One of the following error messages might be displayed:
o ERROR: Patch requires CP/M 3.
o ERROR: Invalid filetype typ.
o ERROR: Serial Number mismatch.
o ERROR: Invalid patch number n
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