On Thu, Nov 17, 2016 at 3:59 PM, dwight <dkel...@hotmail.com> wrote: > Do you have working hardware? >
No, only a drive that 48-bit ECC. I don't know whether it used a National Semiconductor based controller, but it doesn't use the Western Digital polynomial, so NS is my first guess. If it used the DP8466, it might have used the NS Sooper-Sekrit 48-bit polynomial, or some other polynomial. > A lot can be deduced by using simple data, like all 0's and different data lengths. If I got my hands on a DP8496 or DP8497, or a SCSI drive containing one of them, I might be able to hack up something like you describe in order to reverse-engineer the polynomials.
