Hi, is there something like a "HOWTO write a device driver for NetBSD"? I've got McKusick's "The Design and Implementation of the 4.4 BSD Operating System". Are the parts on device driver (attachment etc) and interrupts applicable for NetBSD? Ingolf -- Ingolf Koch Beste Kneipe in Jena-Ost PGP: 0x7B3B5661 213C 828E 0C92 16B5 05D0 4D5B A324 EC04