/* clear the next line that will be revealed by scrolling */
new_line = start_line + NROWS - 1;
- memset16(TEXT_ADDR + new_line * NCOLS, VMEM_CHAR(' ', txattr), NCOLS);
+ memset16(TEXT_ADDR + new_line * NCOLS * 2, VMEM_CHAR(' ', txattr), NCOLS);
crtc_setstart(start_line);
}