hi Phil,

 PC> Anybody seen anything obviously wrong with the following code?  It
 PC> works fine under EMX 0.9a, but I get an ACCESS VIOLATION when
 PC> stepping thru the debugger with BCOS2 v2.0.  BCOS2 crashes in main()
 PC> at the sp = save_screen( sp ) line.

 PC> typedef struct _ScreenS {

 PC>   UCHAR           CellStr[50][264];

I wouldn't do that: even this old ET4000 does 60x132 text mode:-)  Make it
a pointer and allocate what's needed.

 PC>   USHORT          curRow;
 PC>   USHORT          curCol;
 PC>   VIOCURSORINFO   Cursor;
 PC>   VIOMODEINFO     vi;

 PC> } ScreenS;

 PC> // Prototypes
 PC> ScreenS   save_screen     ( ScreenS );

Sounds like the stack is too small for those screens.  Either save them on
the heap or use a huge stack (emx defaults to 32K with -mprobe on all
libraries for automatic growth).

regards,
         hugo