Dec 222017
 
Patch QBasic 4 DTR fix.
File DTRQB4.ZIP from The Programmer’s Corner in
Category BASIC Language
Patch QBasic 4 DTR fix.
File Name File Size Zip Size Zip Type
DTRQB4.DOC 915 518 deflated
TPCREAD.ME 199 165 deflated

Download File DTRQB4.ZIP Here

Contents of the DTRQB4.DOC file


Hello all, thanks to Del Bice, I can let you all have a looksee at the
QB4 DTR Patch.
Here tis:

DEBUG BCOM40.LIB
-D 100 L 5
xxxx:0100

Take the first <3> numbers of 'xxxx' and add 85. Example: if you had
something like 114F:0100 then you would add 85 to 114 and get 199.
The new number you come up with will be 'yyy'.

-S yyy0:0 FFFF 83 C2 04 32 C0

DEBUG will now give TWO locations where these bytes are located. Lets
call the first address is xxxx:yyyy

-U xxxx:yyyy L 6

You should see three lines. the 'xxxx:yyyy' should be represented by
a 'XOR AL AL'

-A xxxx:yyyy
xxxx:yyyy MOV AL, 1 (assemble MOV AL, 1 at the xxxx:yyyy)
xxxx:yyyy (hit enter here)

Now repeat the process with the other number. (starting at the U command)
After you have done that, be sure to save the file:

-W
Writing xxxx bytes
-Q

And there you have it!



 December 22, 2017  Add comments

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