Hi all,
I am building a Compact Flash Interface to the DM642. The CF cards can
operate in 3 modes:
- PC Card memory mode
- PC Card IO mode
- True IDE mode
Does anyone know which of these 3 modes is the easiest to implement for
a DM642 interface? I thought I could focus on the easiest mode if
someone has already done the groundwork on which is the most suitable
mode. I want to mention that I am not interested in implementing a
popular file system for the CF card, I just need to read or write data
out of the card and use its full memory & speed capacity for the same.
My application does not need me to be able to plug it out and connect
it to a PC to retrieve the data.
Also, the specification talks of the CF config registers being 'Memory
mapped' for the 1st mode and 'I/O mapped' for the second mode.
What is
the significance of this from the DM642's point of view? Is there such
a thing as I/O mapped IO for the c64x series- is everything not memory-
mapped anyway?
Thanks and regards,
Anand K.
