15 Feb
2003
15 Feb
'03
9:12 a.m.
On Thu, 2003-02-13 at 07:42, Ethan Dicks wrote:
--- Andreas Freiherr
<Andreas.Freiherr(a)Vishay.com> wrote:
I thought the 11/45 was the second PDP-11 (and the first microcoded
one). The 11/20 was the first and the *very* early ones just said
PDP-11. When the 11/45 was introduced, it was re-named the 11/20. The
11/15 is an OEM version of the 11/20. Just like the 11/05 is the OEM
version of the 11/10.
BTW, somebody asked for pictures a while ago.
Please visit
http://andreas.freiherr.bei.t-online.de/pdp-11/index.htm and have fun!
A correction for your page (nice pic, BTW)... the 11/10 and 11/05 were
the *second* PDP-11 CPU - the first was the 11/20 (and 11/15?).
I have both an 11/05 (working) and 11/20 (still in pieces). The 11/05 is
much more compact and integrated compared to the 11/20 (which has several
backplanes for the CPU and memory).
I'm note sure which CPU has more cards, the 11/20 or the 11/45. :-) The
11/20 has *alot* of flip chips. That's what you get when you just use
SSI TTL. The 11/45 atleast used MSI.
--
TTFN - Guy