hexl-mode replaces scroll-down and scroll-up with hexl-scroll-down and<br>hexl-scroll-up, but these functions ignore next-screen-context-lines;<br>when ruler-mode is off, they scroll by exactly as many lines as are<br>shown in the window, and when ruler-mode is on (as it is by default),<br>
they scroll by one line more than are visible (in other words, they<br>skip a line).<br><br>