Hi folks, I am just beginning to use Dave Gesswein's DumpRest from ftp://ftp.pdp8online.com/software/dumprest/. I successfully restored TD8-E DECtapes with it. That enabled me to install OS/8 on RK05 etc. I also (roughly) integrated the dumprest utilities into OS/8 (I can start them and they reboot OS/8 back to the monitor). And they now use a separate high speed rs232 port to connect to my PC (as my kermit does). When I use restrk05, I always get a checksum error. I just have read one RK05 disk - three times. What I get is always the same checksum error printout with the same checksum. And the generated files are identical as well. I can also successfully run them in SIMH. So what's wrong? Does anybody has a clue? Is that a known problem? Best wishes, Philipp :-)