[sdiy] How to use DRAM ?

[paul van bavel]

Hello, I was thinking about useing static ram for a digital delay.
On 486 and Old Pentium mainbords you can find 256kb or 512 kb static ram 
(used as cache).

I did design and build a 8-bit sampler using eproms.
It needs an eprommer to program eproms (also from old mainboards).
And to play it uses only a 555 timer and a binary counter connected to the 
adress-bus, and a simple 8-bit DAC.
I think that when you use static ram, that it is possible to do it the same 
way for a delay.
I am looking for a good 16-bit parallel DAC and ADC, to keep the design simple.

Paul


At 17:45 28-3-2001 +0200, Michael Buchstaller wrote:
>as most other people, i have some 30- and 72-pin PC Memory
>modules lying around. (4 MB...32 MB each)
>
>Modern mainboards all wants DIMM´s, and everybody is throwing
>out old 486 and early pentiums with such SIMM memory in them.
>
>My idea is to use them in a sampling module or maybe a digital
>delay.
>But how does one access this RAM ? I have done simple things with
>SRAM´s, but if i remember correctly, DRAM´s need some sort of
>refreshing, and have to be re-written after reading.
>How does one do this ? Has anybody used DRAM´s in a project
>successfully? (without special SMD memory controllers of course)
>
>
>-Michael Buchstaller