OK, I have verified that all the tools to run and re-build MACRO-11 do in fact run under vanilla V6. (Which is no big surprise - I'm very familiar with the changes to MIT-V6+, and most of them were in area like the terminal driver, etc; there was no reason to change any of the file-handling primitives. Here: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/macro.tar is a tar file with the whole works, along with the MACRO-11 source. Just download and explode, and read the 'README' file to start with. It does not yet include the source for the 'bind' linker (used with the .REL files that MACRO-11 puts out), because that's in BCPL, and there's no point in adding the source for that until I've put the BCPL compiler itself out, which I will do once I can confirm that it can correctly compile itself (it's written in BCPL) and re-create itself. If the first person to try MACRO could send me feedback, to see if the whole process works, I'd be grateful. Noel