Category : Pascal Source Code
Archive   : PASS_ALL.ZIP
Filename : TI423.ASC

PRODUCT : TURBO PASCAL NUMBER : 423
VERSION : 4.0
OS : MS-DOS, PC-DOC
DATE : SEPTEMBER 20, 1988 PAGE : 1/1

TITLE : PATCH FOR ^KW BLOCK WRITE DISK FILE SIZE NOT
TRUNCATED BUG




This handout describes the patch needed in order for the Turbo
Pascal 4.0 editor to correctly block copy a portion of code out
of a source file and truncate the file's size on disk. The
following patch should be made to the TURBO.EXE file using the
DOS utility, DEBUG.

1. Copy TURBO.EXE to a file called TURBO.TXT. (DEBUG will
not allow modifications to be made to an .EXE file.)

2. Load TURBO.TXT into DEBUG with the command:

DEBUG TURBO.TXT

3. At DEBUG'S "-" prompt, enter the command E CS:3FCD. Press
. This allows you to edit the code at address
CS:3FCD. The number 01. will appear. Type 3 next to it
and press . Enter W to write the patched
program to disk and Q to quit. You have
successsfully patched Turbo Pascal. Your DEBUG session
should look something like this:

C:\TURBO>debug turbo.txt
-e CS:3FCD
29C9:3FCD 01.3
-w
Writing 1C248 bytes
-q

4. Rename TURBO.TXT to TU.EXE. (Use a name other than
TURBO.EXE so you can distinguish between the original and
corrected versions.)