5. Creating a Stack

• The stack is the section of memory used for pushing or popping registers and storing the return address when a subroutine is called.

• The stack often holds temporary and local variables.

• If your main module is written in a high-level language, that language handles the details of creating a stack.

• Use the .STACK directive only when writing a main module in assembly language.

• The .STACK directive creates a stack segment.

• By default, the assembler allocates 1K of memory for the stack. This size is sufficient for most small programs.

• To create a stack of a size other than the default size, give .STACK a single numeric argument indicating stack size in bytes:

      .STACK  2048            ; Use 2K stack