Commodore PC 20 - Page 367

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In this example, the N command setsfilel.exe as the filename for
the subsequent L command, which loads filel.exe into memory.
The N command is then used again, this time to specify the
parameters to be used by filel.exe. Finally, when the G command
is run,filel.exe is executed as iffilel file2.dat file3.dat had been
typed at the MS·DOS command level.
Note
that if you were to execute a W command now, then
filel.exe-the file being debugged-would be saved with the
name file2.dat. To avoid this kind of result, you should always
execute an N command before either an L or W command.
There are four regions of memory that can be affected by the N
command:
CS:5C
CS:6C
CS:80
CS:81
FeB for file
1
FCB for file 2
Count of characters
All characters typed
The first filename parameter that you specify for the N command
has a file control block (FCB) set up at CS:5C. If you name a
second filename parameter, an FCB is set up for this parameter
beginning at CS:6c. The number of characters typed in the N
command (exclusive of the first character, N) is given at location
CS:80.
The actual stream of characters given by the N command (again,
exclusive
of the letter N) begins at CS:81. Note that this stream of
characters may contain switches and delimiters that would be
legal in any command typed at the MS-DOS command level.
Example:
A typical use
of the N command is as follows:
DEBUG PROG.COM
-NPARAM1 PARAM2/C
-G
In this case, the G command executes the file in memory as if you
had typed the following command line:
PROG PARAM1 PARAM2/C
Testing and debugging therefore reflect a normal run-time
environment for
prog.com.
Debug 229
Using the Name
command