Article #15906: UPGRADING 3.0 TO 4.0+ PROBLEMS

 Technical Notes Database

TN906D.txt   UPGRADING 3.0 TO 4.0+ PROBLEMS
Category   :Pascal
Platform    :All
Product    :Turbo Pascal  3.0+

Description:
Q. What Turbo Pascal 3.0 code will cause the most problems
   converting to version 4.0+?
A. With our UPGRADE program (see appropriate Appendix in your
   manual), it's not very difficult to port your code to 4.0+. It
   depends a lot on the type of programs you write. The passing
   of parameters on the stack is done much more efficiently now,
   so changes will have to be made to inline machine code and
   assembly language. Most of the changes are optional: using new
   types, breaking your program into modules to take advantage of
   separate compilation. (The UPGRADE program has a special
   option to help you "unitize" your program too. It does all the
   "typing" for you.) Some stricter type-checking is performed in
   version 4.0+. For example, the Dos unit now defines the often-
   seen registers record type (AX, BX...); MsDos and Intr now
   take this type. In this case, you can typecast or change the
   type identifier and recompile.


Reference:


7/16/98 4:35:37 PM
 

Last Modified: 01-SEP-99