Your main task is to revise the provided assembly language program for calculating factorials. $(*$PLEASE PROVIDE A REVISED CODE IN ITS ENTIRETY; DO NOT SPLIT SECTIONS UP$*).$This time, replace the previous method of handling data with a subroutine that uses local dynamic variables on the stack. Here$$s what you need to focus on:

Dynamic Local Variables: Implement these in the subroutine exclusively. Manage them through the stack using indexed addressing. Avoid PUSH$/$PULL for variable access but use for stack management.

Stack Operations: Utilize INS and DES instructions within your subroutine to manage local variables and return values.

Subroutine Integration: Ensure the factorial calculation is done in a subroutine, with results passed back and stored in the NFAC array.

MORE DETAILS:

Only local DYNAMIC variables can be used in the subroutine. Thus, local variables have to be implemented on the stack and have to be accessed using indexed addressing mode only it is NOT allowed to access these variables through PUSH$/$PULL operations $($PUSH$/$PULL operations are allowed for other purposes such as re$-$ordering the stack though$).$

Local variables and the parameter passing hole must be created and destroyed in the subroutine,not in the main program. Furthermore, INS and DES instructions are only to be used in thesubroutine to open$/$close holes in the stack for the local variables and the return value.

Your program will be using two separate stack regions: the local variable region and parameterpassing region. Make sure that these regions stay separate: do not use the parameter passing region for local subroutine variables $($e$.$g$.,$ do not use the parameter passing hole for a localsubroutine variable$).$

After returning from the subroutine back to the main program $($i$.$e$.,$ after the execution of the RTSinstruction$),$ the $2-$byte passed$-$back parameter needs to be on top of the stack

This modification emphasizes efficient stack management and dynamic local variable handling within the subroutine, replacing the old method of data handling.