>> Not with a B&W monitor, no.

> To clarify, I meant "my current setup" (with NetBSD) won't do
> anything but 1-bit.  The monitor can.  (Do 1-bit monitors even exist?
> How would you build something like that?)

By processing the video signal with electronics designed for operation
in the clipping region, with no attention paid to linearity, gain, or
even exact location of the non-clipping ("linear") region.  (Amplifiers
of this sort are commonly called logic gates.)

There certainly have been monitors designed for 1bpp use, though
whether they could be used for grayscale use by feeding them a suitable
video signal is a matter I cannot more than speculate about.  I don't
know of any mac68k examples (not that I would expect to, since I don't
know that much about old Macs), but the Sun-3 world had them, for
example the older monitors for use with the Sun-3/50 and Sun-3/60.

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