Confirming the Screen Size

Very early versions of BIOS do not maintain the row quantity of the screen. vv_init() needs to know this value in order to initialize certain system and global windows.

To work around this problem, the number of rows on the screen is stored in a global variable #defined as VSROWQ. We set VSROWQ to 25. If the number of rows is otherwise, set VSROWQ to the appropriate value before calling vv_init(). Thus, if you start Vermont Views in 43-line mode on the EGA, the first statements of your program should read:

VSROWQ = 43;

vv_init();