On 980906, Rick Campbell wrote:
As another variant, I think that Hemlock's visible bell flashes
the
edges of the screen. Sort of like what FSF's Emacs does, but adding
the left-most and right-most column (or two) as well.
I used to use an editor (which I would have sworn was either FSF Emacs or
XEmacs) that did visual bell by flashing the center 9th or so of the
window. That worked well.
It may have been XEmacs as distributed by Sun in their C development tools
package.