Enables and disables direct memory access forand statements that output to the screen
When DirectVideo is True, Writes and WriteLns to files associated with the CRT will store characters directly in video memory, instead of calling the BIOS to display them.
When DirectVideo is False, all characters are written through BIOS calls, a significantly slower process.
DirectVideo always defaults to True.
If you want characters displayed through BIOS calls, set DirectVideo to False at the beginning of your program and after each call to