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From: fredb@cheops.OZ (Richard Bassett)
Newsgroups: comp.unix.xenix
Subject: Graphics Drivers Wanted (PC/Hercules)
Message-ID: <713@cheops.OZ>
Date: Thu, 20-Aug-87 13:44:01 EDT
Article-I.D.: cheops.713
Posted: Thu Aug 20 13:44:01 1987
Date-Received: Sat, 22-Aug-87 20:00:37 EDT
Organization: Computer Science, Uni of NSW, Aust.
Lines: 34

Has anybody got graphics screen drivers for either:
	- Hercules monochrome graphics
or (future project)
	- NEC "power" graphics board (1120 x 750 pixels)
for PC/AT compatibles (eg NEC APC-IVs), under (SCO) Xenix Sys V
rel 2.2.1, 80286 version?

Release 2.2 of Xenix-286 comes with rudimentary graphics support for
CGA, EGA and PGA boards.
While the manual entry for stty(1) claims that there is a "herc" option,
the program denies this at runtime, and there is no mention
of [Hh][Ee][Rr][Cc] in any of /usr/include/sys/*.h.

Can I kludge a driver by:
	- opening the device as some other graphics device
	- bashing the hardware registers using ioctl()
	- copying a pseudo-screen bitmap or portions thereof
	  to /dev/kmem?

PS: If you're listening, SCO:
Hercs are supported under Xenix-386, I believe, so why not on the 286?
Is an upgrade imminent?
Is Hercules support part of the CGI (Computer Graphics Interface)
which comes with the 286/386 software Development System (Release 2.2)?

Thanks in advance,...
--
R J Bassett, Dept of Textile Tech, Uni of NSW,
PO Box 1, Kensington, NSW 2033, AUSTRALIA
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