[TUHS] In Memoriam: Per Brinch Hansen

[Larry McVoy]

I suspect not, I suspect his first reference is the one you want.

On Thu, Aug 02, 2018 at 09:10:54AM -0400, Ben Greenfield via TUHS wrote:
> Is this a weblink to that manual?
> 
> I want to read something so well written:)
> 
> Ben
> 
> https://pdfs.semanticscholar.org/b77f/02dedb784a52229c5376277173c5ef6da5c1.pdf
> 
> > On Aug 2, 2018, at 8:44 AM, Doug McIlroy <doug at cs.dartmouth.edu> wrote:
> > 
> > A tangential connection to early Unix experience:
> > 
> > My collection of early computer manuals includes Brinch Hansen's manual
> > for the RC 4000, which stands out for its precise description of the
> > CPU logic--in Algol 60! It's the only manual I have seen that offers a
> > good-to-the-last-bit formal description of the hardware.
> > 
> > DEC presented something of the sort for the PDP-11, but punted where
> > the woods got thick. When I wanted to know how they computed the last
> > bit of floating-point results, I got no satisfaction. Amidst a thorough
> > description of addressing came this formulation of the actual computation:
> > "form floating point result".
> > 
> > Doug

-- 
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Larry McVoy            	     lm at mcvoy.com             http://www.mcvoy.com/lm