Commodore PC - Write

n
n
n
n
Write
Purpose:
Writes the file being debugged to a disk file.
Syntax:
W[address [drive: record record]]
r*) Comments:
If you do not use parameters with the W (write) command,
BX:CX must already be set to the number of bytes to be written;
the file is written beginning from CS:100. If you type the W com
mand with just an address, then the file is written beginning at
that address. If you have used a G (go) or T (trace) command,
you must reset BX:CX before using the W command without
parameters.
Note that if a file is loaded and modified, the name, length, and
starting address are all set correctly to save the modified file (as
long as the length has not changed).
You must have named the file either with the initial debug
startup command or with the N (name) command (refer to the N
command earlier in this manual). Both the debug startup com
mand and the N command properly format a filename in the nor
mal format of a File Control Block at CS:5C.
If you include parameters when you use the W command, the
write begins from the memory address specified; the file is writ
ten to the specified drive: (the drive name is numeric here —
0 = A:, 1 =B:, 2 = C:, etc.). Debug writes the file beginning at the
logical record number specified by the first record. Debug then
continues to write the file until the number of sectors specified
in the second record have been written.
Debug 239
(W)rite
Warning Writing to absolute sectors is extremely risky because
the process bypasses the file handler.
Examples:
If you type the following command, debug will write the file to
disk and then display the debug prompt:
Using the Write
command
N