CompactFlash is a flash memory with an embedded controller that makes it look very much like an IDE device. In fact it has what's called True-IDE mode that makes it look exactly like a minature IDE disk. You read/write the disk using the 8 byte IDE task file and the 16 bit dta bus. The bus can programmatically be reduced to an 8 bit bus if you need to conserve pins.
PIC to CF
PCMCIA@ DOS File Systems@
/techref/member/rr-usa-p64/cf_inst.htm I have code available which operates as a: PIC data logger to CF Card file; the CF Card filesystem is updated; and the data is readable via Windows PC software.+
PIC memory methods +
|file: /Techref/mem/flash/cf.htm, 2KB, , updated: 2008/9/7 22:59, local time: 2020/1/27 02:40,
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<A HREF="http://www.massmind.org/techref/mem/flash/cf.htm"> CompactFlash</A>
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