[TUHS] In Memoriam: Per Brinch Hansen

[Ben Greenfield]

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