AR# 1076: Quicksim II: Obsolete-library RAMs and ROMs output X's in XACT 5.2
Quicksim II: Obsolete-library RAMs and ROMs output X's in XACT 5.2
Keywords: simulation, RAM, ROM, models
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.
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: