Recognition_Concepts_Inc@cup.portal.com (10/21/89)
Does anyone know of away to absolutely turn off the cache on a SUN 3/260 or 3/280 under SUN OS 4.0.3 ? We are experiencing problems with our device driver which exhibited similer symptoms under SUN OS 3.X until we disabled the cache with the instruction VAC_DISABLE_KPAGE(), called from within the MMAP() function. We need an equivalent function under SUN OS 4.0.3 Any and all suggestions would be greatly appreciated. Our only alternative appears to be to use IOCTL calls instead of MMAP().