SIMM, Address Lines Order?

[Allison]

>
>Subject: Re: SIMM, Address Lines Order?
>   From: woodelf <bfranchuk at jetnet.ab.ca>
>   Date: Mon, 26 Sep 2005 08:18:24 -0600
>     To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>der Mouse wrote:
>>>When connecting DRAM chips to the pins of a SIMM (i.e. laying out the
>>>traces) does it matter if the  order of the address and data lines is
>>>preserved?  [...]
>> 
>> 
>> What about refreshes?  (This is a question, not a challenge; I do not
>> know enough about how dynamic RAM refresh works to know whether this
>> really is relevant.  But it seems to me that it might be.)
>> 
>
>Just that all of them gets refeshed in the alloted time.
>Note they just have to be read for refesh. Still you better
>check the data sheets if you got them for the fine print.

If your using cas\ only refresh then the data lines are not used
as that is done with internal refresh counter.

Tim Olmstead wrote a Z80 Dram interfacing manual thats around the net
and cover simms as well as the ram on them. Very useful.  I have an 
electronic copy locally if needed. 


Allison