BBC B Edit
There are a few pre-requisites to running Acornsoft Edit on the BBC Model B. First of all, it must be run in the second processor. I think the Edit code must use 6502 instructions only in the later CMOS editions, such as that found inside a 65(C)02 cheese wedge.
Second, a bit of jiggery pokery is needed to run it. I have a user called Edit on my Econet, and this is the !Boot file running.