how can I get 8 bit values for colors in 256 color modes?

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#19711

From: H.C. Pulley
Date: Mon, 25 Jan 1993 14:59

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I am sorry if this is a FAQ...  Please reply through email; I will post a 
summary if it is needed.

When I try to write 8 bit values to the VGA card for palette setup it seems 
that only the first 6 bits are set (when you read back what you wrote the
highest value I can find is 63).

Is there some special procedure I must follow?  Is my video card too old?  Are
there any books or code examples which do this from the port level?  I am not 
using DOS so I can't use the BIOS.

Thanks alot,
Harry

-- 
         hcp@csx.cciw.ca          |This message released|It takes all kinds,
   hcpiv@grumpy.cis.uoguelph.ca   |to the PUBLIC DOMAIN.|and to each his own.
----------------------------------+---------------------|This thought in mind,
Stay away from the DOS side, Luke!|Un*x don't play that.|I walk alone.

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Newsgroups: comp.sys.ibm.pc.hardware
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!torn!mcshub!csx.cciw.ca!hcp
From: hcp@csx.cciw.ca (H.C. Pulley)
Subject: how can I get 8 bit values for colors in 256 color modes?
Organization: Canada Centre for Inland Waters
Date: Mon, 25 Jan 1993 14:59:39 GMT
Message-ID: <1993Jan25.145939.29696@csx.cciw.ca>
Lines: 19