[Info-vax] OT: obscure PDP11 OSes (even more dinosaury)

[William Pechter]

In article <mm55qv$fff$1 at dont-email.me>,
David Froble  <davef at tsoft-inc.com> wrote:
>Stephen Hoffman wrote:
>> On 2015-06-20 20:29:30 +0000, Hans Vlems said:
>> 
>>> My question was whether the 11/20 had support for 18 bit addresses. I 
>>> thought that the 11/20 was the only model limited to a 2^16 address 
>>> space.
>> 
>> The <http://gunkies.org/wiki/PDP-11> and 
>> <http://hampage.hu/pdp-11/main.html> pages indicate not; that there were 
>> other boxes that used 16 bits of the 18 bit UNIBUS.
>> 
>>  From the Things DECfolks Can't Unsee department: the new Dunkin Donuts 
>> coffee shop color scheme looks like that of a PDP-11.
>> 
>> 
>
>The first PDP-11 I used was an 11/40.  I don't think it had more than 16 
>bits of address space.  Could be wrong.  I seem to recall that the 11/40 
>could run RSTS, but the 11/20 could not.  Top of the line at that time 
>was the PDP-11/45.

There was the ability to have 128kw in an 11/40. (KT11-D memory management 
option...) 

The 11/04/5/10 and the 11/03 were limited to 32kw (64kb).

Bill
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