public void lineFeed() {
if (cursorY != screen.getScrollBottom()) {
cursorY++;
} else {
scroll(1);
}
}
public void setScreen(boolean alternate) {
int scrollTop = screen.getScrollTop();
int scrollBottom = screen.getScrollBottom();
if (alternate) {
screen = alternateScreen;
} else {
screen = defaultScreen;
}
screen.setScrollRegion(scrollTop, scrollBottom);
}