Port SDHC media support from Dynamic C 10 #10
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Includes FAT update to handle 2GB partitions.
Instead of using sdspi_bitrev() to reverse bit order in blocks of bytes before sending or after receiving, convert each byte on the fly as we send or receive. Allows for sending the constant _cmd55 command.
Copied from Dynamic C 10.
This enables elimination of a 512-byte scratch buffer and extra root/xmem memory copy step on every read/write in SD_FAT.LIB.
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This branch contains a back port of the SDHC support code from Dynamic C 10.
It's available for beta testing and feedback before we incorporate it into the main branch.