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Diffstat (limited to 'contrib/smc9462tx-flash/README')
| -rw-r--r-- | contrib/smc9462tx-flash/README | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/contrib/smc9462tx-flash/README b/contrib/smc9462tx-flash/README new file mode 100644 index 00000000..53501cb3 --- /dev/null +++ b/contrib/smc9462tx-flash/README @@ -0,0 +1,24 @@ +This code was written by Dave Ashley for NXTV, Inc. It is released under +the terms of the GPL. The purpose is to let you write to the bootrom of +the SMC9462TX card. The assumption is that you've stuck an AT29C512 in the +socket. Note that the board has pins D5 + D6 reversed on the socket. Also +the socket only supplies 3.3V to the rom. Good luck trying to locate a +DIP programmable flash device that operates at 3.3V. What I do is to bend +pin 32 back and solder a wire directly from the 5V side of the 3.3V regulator +over to it. The dp83820's bootrom interface pins are all 5V logic tolerant. +However mod your board at your own risk, no warranty or guarantees are implied +or given!!! If you don't wire the 5V to the AT29C512, you can still read +the rom contents (it operates ok at 3.3V evidently) but you can't write to it +because the AT29C512 has a safety protection, it disables writes if the +power supply voltage drops below 3.8V. + +See the comments at the top of the 2 C files for more information. + +The Makefile needs to be hacked to build for your system. If you can't +figure it out you shouldn't be messing with this stuff anyway. + +-Dave Ashley +Email address intentionally left out to avoid spam. +http://www.xdr.com/dash + +Mon Mar 8 13:55:34 PST 2004 |