[rescue] Anyone know the encoding on the older IDPROMs?

[Ethan Hawke]

Hello all,

Does anyone have any information on how to decode the 4 digit code on 
the old NVRAMs to a MAC address?

For example I have an IPX with code SBZ9 on the NVRAM, based on the logs 
from it's hard drive, the original MAC was either 8:0:20:19:F7:47 or 
8:0:20:0D:AE:2C, it changed at some point in the logs.

Thanks,
Ethan