Disable scroll

[boriel]

[...]

you can try this simple program

print at 23,0;"hello"
print at 23,0;"hello"
print at 23,0;"hello"
pause 0 ' to see all the screen

Only must be one "hello" if there isn't  scroll

Try adding a ; (semicolon) after the "hello" so it reads:
print at 23, 0; "hello";

and tell me if it works