Hi, Still confusing, my bad. Here's what I'm looking for. Input: @ih,56,6 set 0 Expected output: [ payload load 1 byte @ inner header + 6 bytes => reg 1 ] [ bitwise reg 1 = ( reg 1 & 0xc0 ) ] [ payload write reg 1 => 1 byte @ inner header + 6 bytes ... ] I plan to propose a fix at some point, if possible. sunny