> > Aside: V6 comes in two flavours: no split I+D at all, or split I+D in both > the kernel and user. For some reason that I can't recall, we actually > produced an 'm43.s', BITD at MIT, which ran the kernel in non-split-I-D, but > supported split I-D for the users. I’m pretty sure the V6 kernel didn’t run in split I/D. It supported three user a.out formats: 407 (mixed I&D in one instructions space), 410 (mixed I&D but with the instructions in write protected segments), and 411 (split I&D). It wasn’t too involved of a change to make a split I/D kernel. Mike Muuss and his crew at JHU did it. We spent more time getting the bootstrap to work than anything else I recall. -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2284 bytes Desc: not available URL: