On Feb 11, 9:38 pm, Lyos Gemini Norezel <[email protected]> wrote: > On 02/11/2011 02:52 PM, Oliver Seitz wrote > > > Perhaps the drives... but surely not the file systems. With 368 bytes of > > ram you won't have to try implementing any file system. I'm not sure if 768 > > bytes from the 18F4450 will suffice for a file system. > > The original schematic > (http://justanotherlanguage.org/sites/default/files/pata_hard_disk_sch... > ) used a 16F877 which, like the 887, also has 368 bytes of ram. > > Since I'm only streaming MP3/FLAC data, surely this shouldn't be an > issue for a 16F887? > > > You need a bit of speed. That means to read a sector (512 byte) at once. I > > wouldn't try hard disk access with less than about 1500 bytes ram. > > The only 16F chip that has more than 1024 bytes of RAM is the 16F1527, > and I prefer to use through hole parts... the 16F1527 is a TQFP/QFN part. You can use a 23k256 (32kB) sram with SPI, like shown in the tutorial book. This should be fast enough, or use a 18f46k20 for more speed. > > Lyos Gemini Norezel
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