[Prism54-devel] Re: Re: Re: Prism54 development update

[Johannes Steingraeber]

On Wed, Jan 12, 2005 at 09:28:49PM +0100, Sebastien B wrote:
> On Wednesday 12 January 2005 16:40, Johannes Steingraeber wrote:
> > BTW there must be something wrong with NET2280_EEPROM.bin, AFAIK 8051
> > does start at address 0 but there is no meaningful boot code at that
> > offset.
> 
> The 8051 doesn't start at address 0, there is a header setting up various 
> options in the NET2280. Fortunately, everything is explained in the NET2280 
> datasheet.

Oops, now I got it. I have to strip the register describing part
preceding the 8051 code. The very nice tool net2280dis does the
trick.

Sorry for confusion!

Here is the diff between hexdump of NET2280_EEPROM.bin and
NET2280_EEPROM_XG-701A.bin, mainly vendor and product id and three
other numbers.

diff NET2280_EEPROM.dump NET2280_EEPROM_XG-701A.dump
4c4
< 00000030: 0000 ffff 8404 3a08 0245 8804 0302 0000  ......:..E......
---
> 00000030: 0000 ffff 8404 de0c 0600 8804 0302 0000  ................
79,80c79,80
< 000004e0: 5403 706c 901d 3312 00b8 0000 0802 7f8c  T.pl..3.........
< 000004f0: 7e00 1208 cc90 1d33 1200 b800 0008 0a7f  ~......3........
---
> 000004e0: 5403 706c 901d 3312 00b8 0000 0800 7f8c  T.pl..3.........
> 000004f0: 7e00 1208 cc90 1d33 1200 b800 0008 087f  ~......3........
113c113
< 00000700: 0000 080a 7f8c 7e00 1208 cc7f 987e 0012  ......~......~..
---
> 00000700: 0000 0808 7f8c 7e00 1208 cc7f 987e 0012  ......~......~..

Again quasi identical EEPROM for net2280 but two unrelated vendors
(0x0CDE = Z-Com, 0x083A = Accton Technology Corp)

Regards
	Johannes
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