You need to add the following instructions to the RISC$-$V Otter MCU. As described by the comments, these instructions control data output. After the out$\_$zer instruction executes, all data output from an ISR will be zero; after the out$\_$val instruction, data from all outputs will be normal.

out$\_$zer # forces zero to be output

out$\_$val # allows for normal output from ISR

Required changes to the RISC$-$V MCU hardware $($draw a diagram of required HW additions$)$

Required changes the RISC$-$V assembler

Required changes in RISC$-$V memory requirements

Describe why this modification could be useful