st520 display hardware (help wanted)

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1 total messages Started by Michael Jenkin Fri, 06 Dec 1985 16:48

#1663

Author: Michael Jenkin
Date: Fri, 06 Dec 1985 16:48

16 lines
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In the most recent issue of Analog magazine, there is a program
which uses scan-line driven interrupts to produce a display with
256 or 512 colours on the screen at once.  The author claims to have
found the correct colour shadow registers and line-driven interrupt
information by trial and error.  Does anyone know of documentation
on how the st hardware displays the screen?  In particular
is it possible to do hardware driven scrolling by modifying
the hardware physical screen base at the end of each
scan line drawn?

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Michael Jenkin					University of Toronto
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