manual wanted for Scion Microangelo MA520, palette card

[Eric Smith]

The MA520 was a redesign of the MA512, using 64K DRAMs and 2732 EPROMs.
It also fixed the problem that the MA512 consumed a block of 16 I/O ports
even though it only actually used two.  (That was awful if you wanted to
use four or eight of the things for color.)

I found a scan of the MA512 manual, but nothing on either the MA520
or the palette card.  Does anyone have them?

AutoCAD-80 apparently supported the Microangelo cards:

    http://www.fourmilab.ch/autofile/www/chapter2_14.html

Does anyone still have a copy of that, or any other interesting software
that uses the Microangelo?

Thanks,
Eric