apfiffer@admin.ogi.edu (Andy Pfiffer) (05/08/90)
I'm trying to map the display memory on a Hercules monochrome graphics card under Intel System V/386 into user-space. I have not been successful. I recently ported the Hercules driver for Microport, but setting and clearing pixels with a system call is far too slow. When using the ioctl KDMAPDISP, I get EPERM. I'd really appreciate a pointer to where to RTFM, code fragments, or anything else that might help. Is it true that on other versions of System V that a shared memory segment that points at the display memory is created? I'd really like to know the trick to do that on Intel System V... Thanks. Andy Pfiffer