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Message
From: Brian Korsedal<BKorsedal@b...>
Date: Thu Dec 11 16:55:22 CET 2003
Subject: [openrisc] Open PDA
I think that I will take a different approach. I will put a hd on the board, a large Xilinx FPGA and an epprom. The FPGA will be able to program it's own epprom whenever that is needed. It is easier to impliment this.-Brian -----Original Message-----
From: openrisc-bounces@o... on behalf of Richard Herveille
Sent: Thu 12/11/2003 12:36 AM
To: 'List about OpenRISC cores,free microprocessors'
Cc:
Subject: RE: [openrisc] Open PDA
>
> If anyone knows about how to make a core that reads EXT2 partitions
and
> can search for and load a specific file (the FPGA image), please let
me
> know.
The easiest way is to fix this image to a specific space on the
harddisk. Preferably the very first byte on the disk. Reading it from
there isn't that hard, as all parameters are fixed. You will use LBA
encoding, which is much simpler than CHS. Use a statemachine to program
the harddisk and read the data (PIO mode). Note that a single sector on
a harddisk is fixed as 512bytes.
The OS data would start at the next sector. Your OS, or the harddisk
controller, should take into account that the first sector is not
useable.
You guys should also take a look at the dragonix project. That might be
a good starting point: attachment.bin
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