Re: CFFA for IIc and IIc+?

[alex.freed.007@gmail.com]

On Apr 9, 5:52 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
> For an Apple II, there is no advantage in SD cards at all (once
> a microcontroller is required to read them), and there are numerous
> conveniences.
>

There is no need to use a microcontroller to read/write SD cards. I
have
one on my Pseudo Disk only because it emulates a floppy. In principle
you can use bit-banging by the 6502 itself to access an SD card via
SPI protocol. A single $1 CPLD that will serialize/deserialize data
while
converting the levels 3.3 <-> 5V is all it takes for a practical
solution.
Just a matter of software drivers.

Our Carte Blanche has a connector for an MMC/SD card. Somebody needs
to write a simple driver to use it as a ProDOS volume. Ideally there
should
be a way to select from several logical volumes as the cards now days
are
considerably bigger than the 32 MB max for ProDOS.

-Alex.