https://community.hpe.com/t5/alpha-servers/ev6-byte-lane-optimize/m-p/599207#M136 I have a DS15 that is doing memory mapped I/O to hardware. The problem is that unless a memory barrier asm("MB") is issued before and after each access the upper byte lanes are corrupt. I'm using FORTRAN code.<BR /> <BR /> Any thoughts?<BR /> <BR /> Thanks Thu, 08 Dec 2005 10:03:44 GMT T Gander 2005-12-08T10:03:44Z https://community.hpe.com/t5/alpha-servers/ev6-byte-lane-optimize/m-p/599207#M136 I have a DS15 that is doing memory mapped I/O to hardware. The problem is that unless a memory barrier asm("MB") is issued before and after each access the upper byte lanes are corrupt. I'm using FORTRAN code.<BR /> <BR /> Any thoughts?<BR /> <BR /> Thanks Thu, 08 Dec 2005 10:03:44 GMT https://community.hpe.com/t5/alpha-servers/ev6-byte-lane-optimize/m-p/599207#M136 T Gander 2005-12-08T10:03:44Z