#: 4961 S3/Languages
    07-Jul-90  18:36:49
Sb: #4941-#I don't C so well !
Fm: Zack Sessions 76407,1524
To: TONY CAPPELLINI 76370,2104 (X)

As Pete mentioned, if you try to open a path to a device which is not
ready, the error code returned is 246 (E$NotRdy). If you use the C
Systemhfunction open(), it will simply return -1 on any open error.

Without seeing more of your code, it hard to tell. I tested the following
code segment on my system and it functions as expected, ie, clears the
second line of the display.

#include 
main()
{
    putchar(0x0c);
    puts("This data is on Line 1");
    puts("This data is on Line 2");
    puts("This data is on Line 3");
    tsleep(120);
    putchar(0x02);
    putchar(0x20);
    putchar(0x21);
    putchar(0x04);
    fflush(stdout);
    tsleep(120);
    putchar(0x02);
    putchar(0x20);
    putchar(0x2a);
    puts("Just one more line!");
}

Oh, and $0B is not just for graphics screens.

Zack

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