File SCREEN.C:
    scr->screen_top=scr->buffer_top=hgScrLine=ScreenNewLine();

    fpScrLine=(SCREENLINE far *) LINE_MEM_LOCK(fpScr->buffer_top);

    LINE_MEM_FREE(fpScr->buffer_top);

    fpScr->buffer_top=hsTop;

    fpScrLine=(SCREENLINE far *) LINE_MEM_LOCK(fpScr->buffer_top);

    LINE_MEM_UNLOCK(fpScr->buffer_top);

                if (fpScr->screen_top==fpScr->buffer_top) break;

                    if (fpScr->screen_top==fpScr->buffer_top) break;

File SCREEN.C:
    scr->screen_bottom=scr->buffer_bottom=hgScrLine;

    fpScrLine->prev = fpScr->buffer_bottom;

    fpScrLineTmp=(SCREENLINE far *) LINE_MEM_LOCK(fpScr->buffer_bottom);

    LINE_MEM_UNLOCK(fpScr->buffer_bottom);

    fpScr->buffer_bottom=hgScrLine;

                if (fpScr->screen_bottom==fpScr->buffer_bottom) break;

                    if (fpScr->screen_bottom==fpScr->buffer_bottom) break;

//    hgScrLine=fpScr->buffer_bottom;

File INTERN.C:
    if (fpScr->screen_bottom != fpScr->buffer_bottom) {

        fpScr->screen_bottom=fpScr->buffer_bottom;

