Alex Holden skrev:
>On 27 Jan 2001, Iggy Drougge wrote:
>> addon boards). Why shouldn't it be possible to make SDRAM to SIMM adapters?
>SDRAM, FPM, and EDO are types of dynamic RAM.
>SIMM, DIMM, and SO-DIMM are types of memory card.
Ahh. I don't own any computers with this kind of memory, so I've never managed
to learn the nomenclature.
>So I'm not sure what exactly you're asking. If you're talking about making
>an adaptor to plug DIMMs with EDO or FPM on them (which are pretty rare
>now) into a system designed for SIMM EDO or FPM RAM, that could probably
>be done. If you're talking about making an adaptor for plugging DIMMs with
>SDRAM on them into a system designed for SIMM EDO or FPM RAM, you're out
>of luck unless you design a specialised memory controller to drive the
>SDRAM signals (it can probably be done, but it'd take a lot of work). This
>has been something of a problem in the embedded systems world because most
>manufacturers have already stopped, or are planning to stop in the near
>future, all production of EDO and FPM RAM. However there are a great deal
>of embedded systems in production which have not been updated to use SDRAM
>(to do so would frequently mean moving to a whole new processor
>generation as older devices like the Z80 and 68000 family simply can't
>drive SDRAM without a specialised and complex external SDRAM controller).
I'm also running a 68040 system as my main system, that's why I'm interested
in using this kind of memory.
I suppose this isn't like wiring a SIMM into a system built for DRAM
capsules, such as an Atari ST?
--
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Received on Sat Jan 27 2001 - 08:51:40 GMT