Commodore PC - Page 301

Debug 2291
In this example, the N command setsfilel.exe as the filename for
the subsequent L command, which loads filel.exe into memory.
/*-v 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 Hfilel 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
FCB 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
f0^ 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
f-^ 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: Using the Name
command
_ DEBUG PROG.COM
O -NPARAM1 PARAM2/C
-G
n
In this case, the G command executes the file in memory as if you
had typed the following command line:
O PROG PARAM1 PARAM2/C
-^ Testing and debugging therefore reflect a normal run-time
( ) environment for prog, com.