From: dave@horsfall.org (Dave Horsfall)
Subject: [TUHS] First Unix that could run on a PDP-11 with QBUS
Date: Sun, 27 Jul 2014 15:49:47 +1000 (EST) [thread overview]
Message-ID: <alpine.BSF.2.00.1407271543350.4064@aneurin.horsfall.org> (raw)
In-Reply-To: <20140727032639.46B6718C0DE@mercury.lcs.mit.edu>
On Sat, 26 Jul 2014, Noel Chiappa wrote:
> That may or may not be true; let me explain. The 11/23 is almost
> indistinguishable, in programming terms, from an 11/40. There is only
> one very minor difference (which UNIX would care about) that I know of -
> the 11/23 does not have a hardware switch register.
I recall that there were other differences as well, but only minor. In my
paper in AUUGN titled "Unix on the LSI-11/23" it will reveal all about
porting V6 to the thing.
I vaguely remember that the LTC had to be disabled during the boot
process, for example, with an external switch. Then again, I could be
thinking of some other weird box to which I'd ported V6. As far as I
know, it was the first such port in Australia (if there were others then I
never heard about them).
-- Dave
next prev parent reply other threads:[~2014-07-27 5:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-27 3:26 Noel Chiappa
2014-07-27 5:49 ` Dave Horsfall [this message]
2014-07-28 22:04 ` Warren Toomey
2014-07-28 22:38 ` Warner Losh
2014-07-29 9:06 ` SPC
2014-07-29 13:28 ` Clem Cole
-- strict thread matches above, loose matches on Subject: below --
2014-07-28 13:27 Noel Chiappa
2014-07-28 22:23 ` Dave Horsfall
2014-07-29 9:46 ` Warren Toomey
2014-07-29 9:56 ` Dave Horsfall
2014-07-29 14:33 ` Clem Cole
2014-07-29 13:10 ` Milo Velimirović
2014-07-27 5:39 Norman Wilson
2014-07-27 6:02 ` John Cowan
2014-07-27 14:10 ` Bill Pechter
2014-07-27 17:16 ` Dave Horsfall
2014-07-27 2:37 Mark Longridge
2014-07-28 15:57 ` Ron Natalie
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