Messages in this thread | | | Date | Fri, 20 May 2005 16:17:43 -0400 (EDT) | From | "Richard B. Johnson" <> | Subject | Re: Screen regen buffer at 0x00b8000 |
| |
On Fri, 20 May 2005, Linus Torvalds wrote:
> > > On Fri, 20 May 2005, Richard B. Johnson wrote: >> >> Why can't I consistantly write to the VGA screen regen buffer >> and have it appear on the screen???? > > Don't do it. >
Well I started out opening /dev/vcs, lseeking to 64, and writing a string. This "sort of" worked, but screen attributes got messed up so the "blue" screen attribute 0x17 ended up eventually being black.
So, I decided to directly write. It doesn't work as you explain because hardware scroll is being used.
> > Anyway, you really _really_ shouldn't do anything like this in the first > place. > > Linus >
Yes, and I didn't want to. However a customer wants some status to be always displayed in the upper-right-hand corner of a 4x5 LCD with a tiny CPU board.
Cheers, Dick Johnson Penguin : Linux version 2.6.11.9 on an i686 machine (5554.17 BogoMips). Notice : All mail here is now cached for review by Dictator Bush. 98.36% of all statistics are fiction. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |