David Bond wrote:
Another possibility is that it is yet another undocumented instruction. Invariably the undocumented instructions are privileged. Once someone has a z196, all they have to do is attempt to execute C8x3 to see if the result is an operation exception or a privileged operation exception.
And there are some instructions (like MVCX) that work only when fetching from millicode. -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 310-338-0400 x318 [email protected] http://www.phoenixsoftware.com/
