Mode 1 puts the application and smx into Virtual 8086 mode. In this mode, interrupts are disabled only when changing the window, not when accessing extended memory. This adds some overhead to interrupt servicing. Determines amount of extended memory and divides it into blocks. Then establishes VM86 environment, if mode 1 is specified.
Returns handle to it.
Returns processor to real mode. Maps extended memory block to window. Inc. All rights reserved.