Formatting a CompactFlash card and using it.

Don't be misslead by the term "memory mapped mode". This does NOT mean that one or more sectors would be mapped into your host cpu's memory for random access. The mode is fairly similar to the normal interfacing in that you must read and write sectors into the RAM of the host cpu modify it there and write it back sector by sector.

I found the app notes from Sandisk quite helpfull along with the docs you aparently already have.

With regard to formatting - well, there you need to wirte the information to it acording to the filesystem that should reside there. If it's FAT then it's fairly easy, but it still requires that you make yourself comfortable with the FAT filesystem layout. There are several sources about this topic like i.e.

I'm sure there is a ton more information around.

Markus

This is a bookmark I have which may be helpful :

Zel electronics on flash disks :

You should use ATA mode. All Compact Flash storage cards implement ATA/IDE mode. Some IO cards (ex. ethernet cards) uses memory mode for buffered access.

The spec allows paged memory implementations; however, not too many devices are implemented this way.

Err - no, they don't. All they say is that in memory mapped mode, if A10 is high, the device will ignore all other address lines. This allows that the host CPU can use block move operations because the data register is located at address '0'. This IS an advantage over true IDE mode but its definately not compareable to what's otherwise usually understood with memory mapping in general. A CompactFlash card that IS a CompactFlash card MUST implement this behaviour or else it would not be a CompactFlash card.

Markus

This can't be true in general. Some I/O cards (CF ethernet and/or wifi) use all 11 addresses (including A10). It might be a specific implementation.

Sound like you are descripting I/O mode, rather than memory mode.