PDP-8 /e/f/m memory

[Allison]

>
>Subject: Re: PDP-8 /e/f/m memory
>   From: Gerold Pauler <gerold.pauler at gmx.net>
>   Date: Mon, 14 Aug 2006 19:11:48 +0200
>     To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>If you  are able to read german text, then the documentation of a 32KW 
>dynamic memory modul
>from mico for the pdp8/e/f/m and /a may give some hints.
>I've made a scan available under
>http://pdp8.de/download/mico-mem.pdf

Thanks, While I do not speak German it is still and engineering document
so it's form and content are known.  Makes working with foreign languages 
easier.

It will be of some help along with the DEC docs I have.


Allison


>
>- Gerold
>
>C H Dickman wrote:
>
>> vrs wrote:
>>
>>> I looked at doing one of these, but got kind of lost about how the 
>>> timing signals are used.  I looked at the MOS RAM for the 8/A, but 
>>> there's all this cruft for refresh in there, some stuff about 
>>> suppressing access during ROM access, etc.  And then it looks like 
>>> the memory timing signals are derived somehow from the memory refresh 
>>> stuff??
>>>
>>> Is there a nice place where the Omnibus memory interface control 
>>> signals are explained somewhere?
>>>   
>>
>> I did a semiconductor memory design for the OMNIBUS several years ago. 
>> It was for an -8/e and 32kW using two SRAMs. I never got to 
>> documenting it outside of my notebook, but if there is enough 
>> interest, I could do some schematics. It is battery backed, so its 
>> pretty much equivalent to the core I was replacing.
>>
>> The Small Computer Handbook, the maintenance manuals and timing 
>> diagrams from the processor print sets had enough information for me.
>>
>> -chuck
>