nanogui@linuxhacker.org

Greg Haerr <greg@censoft.com> writes:

   On Wednesday, May 19, 1999 5:21 PM, Ben Pfaff [SMTP:pfaffben@msu.edu] wrote:
   > Greg Haerr <greg@Censoft.com> writes:
   > 
   > 	   I'm talking about the planar modes, which are a pain in the ass.
   >    I thought you were working on the vga16 driver, which uses the planar modes.
   >    In the planar mode, the hardware is setup the way I've been describing.
   > 
   > Yeah, but you still need two memory accesses, one to load the latches,
   > one to store them.  If you've got a fun magic way to avoid this, let
   > us know!

	   No, thats why the |= operator works so well, it generates a read followed
   by a write bus cycle...

Now I'm really confused.  Isn't that still read-modify-write?  It's a
read, followed by modifying the data, followed by a write.  Maybe we
need some better definitions.  How do you define rmw?
-- 
"...In the UNIX world, people tend to interpret `non-technical user'
 as meaning someone who's only ever written one device driver."
--Daniel Pead