Osborne Executive system patch

If a CPM3 command in a SUB file or on a multiple command line
begins with a colon and the preceeding program ended with an
error, the command will not be executed.  Ending a program with
^C (control C) is not considered an error termination in spite of
the wording of the DRI CPM Plus Programmers Guide (page 1-23). 
Under some circumstances this may be the correct choice, but
consider this command line:

	CC FOOBAR ! RMAC FOOBAR ! LINK FOOBAR,STDLIB

If many errors occur in the c compilation or assembly steps, it
would be nice the abort with a ^C and not have to sit through
futile executions of the linker.  The patch described below
convinces the console command processor to accept ^C terminations
as errors and not execute the next command.

	Use DU or similar disk editor to change 
	Track 1  Sector 19  Addresses 16-18
	       FROM	CA 1C 0A
	         TO	00 00 00
	If the bytes on your disk are different from those shown
	DO NOT MAKE THE PATCH.

Doctor Dobbs Journal Vol 9, Nr 2 (2/84) page 16 showed a number
of patches, one of which killed all waiting commands on the
multiple command line.  This patch will only kill the one command
following the aborted program.

Unfortunately the patches were made to the relocatable
system files as distributed by DRI.  Osborne distributed
neither the system relocatables nor GENCPM to use them with.  If
anyone has converted those patches to a new CPM3.SYS file for
the Exec, I would like to hear about it.  Perhaps FOGHORN would
publish the absolute patches.  The rest of the published
patches increased the efficiency of buffer handling, corrected
a hard disk BIOS READ ERROR bug, made it possible to read 
directory on disks marked R/O, and corrected a random read
error bug encountered on large files.

GORDON WILK
6707 Springpark Av		(213) 645-6419
Los Angeles CA 90056

random read
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