Answers Database

Quicksim II: Obsolete-library RAMs and ROMs output X's in XACT 5.2


Record #1076

Product Family:  Software

Product Line:  Mentor

Problem Title:
Quicksim II: Obsolete-library RAMs and ROMs output X's in XACT 5.2


Problem Description:
RAMs and ROMs from the obsolete library may not simulate correctly in
Quicksim using the XACT 5.2 software.  In Quicksim, they output X's.

The core RAM and ROM simulation models (under $LCA/gen_lib) were modified
in XACT 5.2 so that the Unified-library memory elements more closely
emulated their real-world counterparts in chip-reset situations.  This,
however, made them incompatible with the obsolete-library elements.


Solution 1:

To fix this, copy or link to the XACT 5.1.1 version of the $LCA/gen_lib
directory into the XACT 5.2 directory.	Be sure to keep the XACT 5.2 copy
of the gen_lib directory backed up, as this library should be used with the
XACT 5.2 Unified libraries.

For example, let's assume you have the following directory trees:

   /tools/xactmen/511/gen_lib	(XACT 5.1.1)
   /tools/xactmen/520/gen_lib	(XACT 5.2.0)

You would then link:

   mv /tools/xactmen/520/gen_lib /tools/xactmen/520/gen_lib_520
   ln -s /tools/xactmen/511/gen_lib /tools/xactmen/520/gen_lib

Quicksim should now run properly.  (No recompilation is required.)



End of Record #1076