From: ron@ronnatalie.com (Ronald Natalie)
Subject: [TUHS] v6tar from v7 on v6, too large?
Date: Wed, 9 Dec 2015 06:31:39 -0500 [thread overview]
Message-ID: <D2CF2258-4B5B-42B9-A1D4-5E82737E61AC@ronnatalie.com> (raw)
In-Reply-To: <20151209051720.4C6D218C0C5@mercury.lcs.mit.edu>
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>
> 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.
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next prev parent reply other threads:[~2015-12-09 11:31 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 5:17 Noel Chiappa
2015-12-09 5:55 ` Mark Longridge
2015-12-09 11:31 ` Ronald Natalie [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-12-19 13:27 Noel Chiappa
2015-12-10 4:50 Noel Chiappa
2015-12-09 22:16 Noel Chiappa
2015-12-09 22:31 ` Clem Cole
2015-12-09 22:47 ` John Cowan
2015-12-09 23:39 ` Steve Nickolas
2015-12-10 0:24 ` Clem Cole
2015-12-10 0:23 ` Clem Cole
2015-12-10 1:08 ` Greg 'groggy' Lehey
2015-12-10 9:42 ` Jacob Ritorto
2015-12-10 1:19 ` John Cowan
2015-12-10 10:06 ` Oliver Lehmann
2015-12-10 19:50 ` Will Senn
2015-12-09 22:01 Noel Chiappa
2015-12-09 17:50 Noel Chiappa
2015-12-09 18:06 ` Will Senn
2015-12-09 14:56 Noel Chiappa
2015-12-09 16:37 ` Will Senn
2015-12-09 14:24 Noel Chiappa
2015-12-09 13:30 Noel Chiappa
2015-12-09 14:43 ` Ronald Natalie
2015-12-09 20:41 ` Dave Horsfall
2015-12-09 4:53 Noel Chiappa
2015-12-09 14:38 ` Will Senn
2015-12-09 14:56 ` Clem Cole
2015-12-09 15:07 ` Clem Cole
2015-12-09 16:29 ` Will Senn
2015-12-09 14:59 ` Hellwig Geisse
2015-12-09 17:55 ` Will Senn
2015-12-09 3:33 Will Senn
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