Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!diemen!tasman!steveh
From: steveh@tasman.cc.utas.edu.au (Steven Howell)
Newsgroups: sci.electronics
Subject: DRAM INTERFACE CONTROLLER
Message-ID: <steveh.662964261@tasman>
Date: 4 Jan 91 04:44:21 GMT
Sender: news@diemen.utas.edu.au
Distribution: sci
Lines: 16



	Hi, I am about to employ a system for storing  information
electronically in one of our graphic systems. I intend on using 8x1Mb Simm
modules, however the technique of controlling CAS and RAS is not familiar
to me yet, and I wish to use a Hybrid controller to do the timming for me
 I have look up a couple of IC's that will do the job, but are $100 or so
dollars, making it uneconomical (The chip is a 74S409).

	Does anyone have experience with this type of memory control, and
would be happy to give me some suggestions on how I can interface 4Mbx8 
to a 65c02 in a 4 bank configuration (The 6502 has only 11 available address
lines for accessing memory, which means it can access only 1Mb of dynamic
memory)

			Thanks in advance.   Steve h