Thanks for giving it a go, did you get a reply ? I have successfully downloaded RT-11 v5.3 from the net and I can sysgen it for DU and DL devices - no support for the DELUA, sadly - I think that might have been included in the DECNET disk which was offered separately. I have the DECNET disk on an RL01, but the kermit I have doesn't support fetching the disk image - at least via "get DL0:". So I can't get a copy of DECNET into the emulator. I have sysgen'd OK in the emulator, but I now have the problem of getting the resulting file out of the emulator and into the '11. The emulator writes to a single binary file in Linux, which is an image of a whole disk. I don't know whether my version of kermit-11 will write to the raw device DL1: a bloke on the net reckons this is possible, but I haven't tried it ... it is a big step to take because it means overwriting a whole platter, and I don't have (m)any to spare. Also, another problem has appeared - out of 3 RL01 drives, only one is working at the moment. I can't figure out what is wrong with the other ones, but it's going to make transferring this file system somewhat difficult. I'd have to boot from a working RL01 with an O/S and kermit and overwrite both the O/S and kermit with the new version of the O/S. I tool the DELUA out of the system to see whether it was interfering with RL-11 (RL01 controller) and somehow causing a disk problem, but it didn't make any difference. I'm going to look at RSX-11 to see whather that will support the DELUA, if not then at worst I might have to look for a DEUNA. The various comms manuals contain dire warnings about the earlier -11s not being able to keep up with the DELUA anyway. If you have the time sometime to come over and read the RL01 circuits for me then that would be very helpful. (Of course, the ideal way to go would be to get a pair of RL02's but of course they're rarer than hen's teeth). Fran John Honniball wrote: