[comp.graphics] PGA help?

jmorton@newton.Berkeley.EDU (John Morton) (02/10/89)

My shop has inherited an IBM PC AT with PGA.  I embarked on a project
which requires plotting points on the screen, and immediately discovered
that PGA was apparently forgotten soon after it was released - the C
compilers here don't mention it, anyway.

What I need is a bit of sample code which will display something using
"high-function graphics", i.e. the 640x480 mode.  I am working out of
the Professional Graphics Controller Technical Reference, which
lists a lot of graphics commands that can be sent to buffers at certain
addresses in video memory.  So far I can't get anything up on the 
screen, so I guess my understanding of the book is incorrect.  

I am using Microsoft C (actually Quick C), calling movedata() to
poke memory.

Any suggestions?  (Be explicit - I am pretty new at this!)

thanks in advance, John Morton
			jmorton@newton.berkeley.edu