Path: utzoo!attcan!uunet!husc6!uwvax!oddjob!ncar!noao!arizona!naucse!rrr
From: rrr@naucse.UUCP (Bob Rose )
Newsgroups: comp.sys.att
Subject: Re: UNIX PC Graphics Questions
Message-ID: <700@naucse.UUCP>
Date: 17 May 88 00:00:53 GMT
References: <2271@inco.UUCP> <267@uncle.UUCP>
Organization: Northern Arizona University, Flagstaff, AZ
Lines: 19

In article <267@uncle.UUCP>, jbm@uncle.UUCP (John B. Milton) writes:
> In article <2271@inco.UUCP> todd@inco.UUCP (Todd O'Connell) writes:
> > [Is there any way to directly access screen memory?]
 
> The UNIXpc screen memory is located at $420000, and the only way to access
> that area of memory would be through a loadable driver. This kind of access
> would screw up the window manager's view of things.

What about opening `/dev/mem' for reading and writing.
Note, I'm note responsible if you miss the screen and hit
the drive controller crashing your hard disk.

There is an `ioctl' that allows you to get and put thing on the
screen.

BTW Does anyone know the location or symbol name of the x and y values
of the mouse in `/dev/kmem.' There should be a way to open
`/dev/kmem' (for reading only) and get these values. Using
the tty driver is very SLOOOWWWWWW!!!!!!! (version 3.51)