[E3-hacking] Support status update

David Given dg at cowlark.com
Thu May 20 17:36:50 BST 2010

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On 20/05/10 01:46, Matt Callow wrote:
> I think the E3 card reader is just done in software - bitbang on a
> couple of GPIO pins.  So I think it should be possible to use if for
> SPI/MMC. I think USB is less likely

Bitbanging MMC is pretty grim. Although, now we have the FIQ handler
less grim than it was...

Can one still get mass storage smartcards? The only ones I ever heard
about were M-Systems' MegaSIM, which then became SanDisk's SIM5000, and
then vanished completely.

And speaking of SPI --- isn't there a proper SPI interface somewhere
inside? Like, one with a FIFO? Given that all SD and MMC cards support
SPI, could this be used as an easy mass storage option (and hopefully a
faster one than the smartcard interface).

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