From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <005801c1451f$7205a5c0$a2b9c6d4@SOMA>
From: "Boyd Roberts" <boyd@fr.inter.net>
To: <9fans@cse.psu.edu>
References: <20010924172455.5597119A73@mail.cse.psu.edu>
Subject: Re: [9fans] Nextstaion as plan9 terminal
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Date: Mon, 24 Sep 2001 19:36:29 +0200
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> We also had continuing problems with backing out of interrupts:
> the processor didn't take interrupts between instructions.  Instead
> you had to figure out the state of the machine and back it out by hand.
> We were pretty good at this but I remember there still being a lingering
> problem.

reminds me of the early 68020s.  apart from the n too many interrupt
stacks frames there was a scary piece of assembler to mangle the
frame and then resume -- nasty.