Hi, Hope it won't be off topic. I have now a rtlinux v3.0 + 2.4.3 kernel running a RTmodule which catch vme interrupts and DMA interrupts. Everything run on a vme board with a powerpc 603r. I would like to thanks everybody who work on rtlinux and the powerpc kernel... Thanks to Gabriel Paubert for his help on running his driver for the Tundra Chip. O+ xavier -- 33 (0) 1 69 15 79 59 De chacun selon ses forces, a chacun selon ses besoins