From: Gary Moody (gmoody_at_gmx.net)
Date: Sun Apr 17 2005 - 01:11:18 PDT
Hi Matt,
No, that is incorrect. All newtons can use both flash and SRAM cards,
except for the eMate. The Newtons prior to the MP2X00 series could only use
the 12v/12v cards (Flash and SRAM). The MP2X00 series can use either the
12V/12V cards (Flash and SRAM) or the 12V/5v cards (Flash only). The eMate
can only use the 12V/5v cards (Flash only), which is why you can take a
12v/12v card from a messagepad, put it into an eMate, and mount it
read-only.
The read-write lifetime of flash memory is 100,000 cycles per block. This
equates, under normal use in a Newton, between 5-20 years of life for the
cards. Identical cards used in a router (Cisco uses linear Flash cards) can
be used up in a couple of hours. This is why you want to stay away from
Flash cards previously used in routers.
Everything I have is Flash. IIRC, the SRAM cards required an internal disk
battery to maintain a memory image. Battery dies, data image goes with it.
This is why they fell out of favor. I've put in flash cards written to 6
years before, and the data is still there, intact and uncorrupted...the way
it should be. ;)
HTH!
Regards,
Gary
> The eMate and 2x00 series are Flash based and everything prior to that
> is SRAM based, correct? Anyone know the write cycle lifetime of the
> Flash used inside the eMate and 2x00 series? Being a programmer and
> wanting to do some 2x00 specific programming I was wondering if any
> one has a PCMCIA SRAM card for sale? Nothing big as a 2MB or 4MB card
> would be fine.
>
> -Matt
> --
> This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries
> Official Newton FAQ: http://www.chuma.org/newton/faq/
> WikiWikiNewt for all kinds of articles:
> http://tools.unna.org/wikiwikinewt/
>
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