Mark ... many thanks. Your last comment prompted me to avoid using Write/Writeln to monitor what was happening. By removing Write/Writeln from the threads , ... everything works correctly with two threads , one running on core1 and the other thread running on core2.
I think this boils down to the original issue that I found writing directly to the graphics card frame buffer , which is the same as Write/Writeln , in that there is only one physical display device which is not easily shared. Regards Vern -- View this message in context: http://free-pascal-general.1045716.n5.nabble.com/GetAffinity-SetAffinity-tp3351231p5717557.html Sent from the Free Pascal - General mailing list archive at Nabble.com. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
