WHAT A LOAD OF VAR!!! Since i don't know where all those BIT var will comming from, i figure it will be more easy to use a different approach. let us know what goes in and out... for the serial output... not a problem but for the AMOUNT of BIT variable, sure we can suggest you a other way to do what you want. Example work with a WORD sized variable that can provide you a 65536 different case, BYTE 256 or else.