Override of Swap Lock
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
A method is described for overriding the lock of swapping from operating system utility mode to host communication mode on a microcomputer. It is important to prevent a user from leaving a utility in the middle of processing and entering another function, such as host communication mode. The problem with doing this is that the utility functions are not reentrant. That means that if the utility is invoked again, the utility will not function properly. A lock is provided to prevent the user from switching and reinvoking a utility. However, if processing cannot continue unless some action is taken outside of the utility processing, the user must be allowed to exit.