OpenEuphoria

RE: [OT] sdram info needed

• Posted by gertie at visionsix.com Mar 27, 2003
• 328 views

On 27 Mar 2003, at 10:12, rudy toews wrote:

> 
> 
> gertie at visionsix.com wrote:
> > 
> > Does anyone have a schematic on how to make a commonly available 
> > generic dimm sdram/edo look like a plain olde static ram? With 3gigs of 
> > data, at 60ns/access/byte, it will take 3 minutes to bruteforce search 
> > it, and 
> > obviously using software on top of an OS will take considerably longer. 
> > I am 
> > thinking of reviving a 20yr old idea, which wasn't useable back when 
> > dram 
> > came in 16Kx1 chips and was $1500/megabyte. But to make it work, i need 
> > to use the mass produced and much cheaper computer memory forms, 
> > which i am lacking info on. Online references or available book sources 
> > welcome.
> > 
> > Unless someone has 10,000's of 3 to 10 gigs of the olde dip chips they 
> > want 
> > to get rid of?
> > 
> > Thanks,
> > Kat
> > 
> > 
> hi Kat
> now i am curious.  i think i still have some old manuals for memory 
> boards. i started computing with an S100 system (cromemco)(pre-ibm pc) 
> and had added a 'ram drive' to it. is that your project?
> i had bought the ram drive already assembled.

I remember the S100 stuff, but i never had one myself. I did have a ZX80, 
VIc20 and C64. The C64 still works fine. I have books on chips like the 6116, 
and others of that era. For massive memory those chips are still far too 
expensive, in parts cost and assembly time and power use. I expect i will be 
using the smallest simm or dimm modules i can reasonably get. I am more 
interested in width than depth of the memory. I don't have books on the 
simms or dimms, or application notes and gotchas.

Kat