[Arm-netbook] ingenic jz4760 eoma-68 card

luke.leighton luke.leighton at gmail.com
Fri Mar 15 11:26:32 GMT 2013

On Fri, Mar 15, 2013 at 10:08 AM, Joe Michael
<joem at martindale-electric.co.uk> wrote:
> On Thu, 2013-03-14 at 22:07 +0000, luke.leighton wrote:
>> ok, bit of progress.  i've tracked down an app note for a USB-to-SATA
>> converter from JMicron [*1], worked out that the maximum limit of the
>> jz4760 is 512mbytes of RAM and found a suitable RAM chip that looks to
>> be around 45RMB (2 are needed).  that's about $16 for a pair of RAM
>> ICs (!)  mad.  absolutely mad.  considering that 4 hynix chips
>> totalling 1gbyte of 800mhz DDR3 RAM is under $5.
> You should be able to use the 1GB DDR3 and either not use half the chip,
> or set a GPIO port pin to toggle from one set of RAM addresses to the
> next and have say two independent Linux distros running at the same
> time! :-)

 euuw, euuw, that's either very very sick, or very very sensible, i'm
not sure which.

 actually thinking about it, if you used 2 GPIOs you could split into
4, address 2 of them at any one time, and use 2 as a large swap cache.

 or something dreadful.

 ... anyone remember the Z80?  able to address *gasp* 1Mbyte of RAM!


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