adoyle@bbn.com (Allan Doyle) (05/08/90)
We have a new Motorola Delta 8864 system with dual 88k CPU running System V Release 3.2. We are trying to plug a Tadpole 1600x1200 color graphics card into it. The problem we are having is with a sequence of calls to shmget() and shmat(). Rather than delve into the many ways I have tried it that have failed, does anyone out there have a working code fragment they can send me that will: Grab a 20 Mbyte hunk of shared memory at a given physical memory location (the frame buffer and control registers) Attach to that shared memory and use it from user space. Thanks in advance. Allan Doyle adoyle@bbn.com BBN Systems and Technologies Corporation (617) 873-3398 70 Fawcett Street, Cambridge, MA 02138
andrew@frip.WV.TEK.COM (Andrew Klossner) (05/09/90)
Some versions of the Motorola V.3.2 kernel disallow a shared memory
segment bigger than 4M. Try building your 20M shared segment in five
4M-sized pieces.
-=- Andrew Klossner (uunet!tektronix!frip.WV.TEK!andrew) [UUCP]
(andrew%frip.wv.tek.com@relay.cs.net) [ARPA]