Use one Multiplexer and one Demultiplexer to implement a simple circuit that will copy a specified register to another specified register. There are four registers, each 32 bits wide. There are two signals (S1 and S0) that specify the source register to be copied and two signals (D1 and D0) that specify the destination register (the register into which the source register's value is to be copied). You can definitely use busses in your circuit drawing. Draw the register file, the mux, the demux, and all busses.

Formatting rows and columns is similar to cell formatting. in an openoffice calc spreadsheet, you can format data entered into rows and columns with the of the rows and columns options. you can insert rows and columns into, or delete rows and columns from, a spreadsheet. use the insert or delete rows and columns option on the insert tab. alternatively, select the row or column where you want new rows or columns to appear, right-click, and select insert only row or only column options. you can hide or show rows and columns in a spreadsheet. use the hide or show option on the format tab. for example, to hide a row, first select the row, then choose the insert tab, then select the row option, and then select hide. alternatively, you can select the row or columns, right-click, and select the hide or show option. you can adjust the height of rows and width of columns. select row and then select the height option on the format tab. similarly, select column, then select the width option on the format tab. alternatively, you can hold the mouse on the row and column divider, and drag the double arrow to the position. you can also use the autofit option on the table tab to resize rows and columns.