IBM BSC CRC?

[Chuck Guzis]

On 1/26/20 3:12 PM, Bob Smith via cctalk wrote:
> I ma rusty on this, been almost 50 years since I worked on the DP8EP
> aka the KG83. then the KG11, and the Autodin 2 CRC32 designs in
> hardware.
> I don't recall whether bisync, aka bsc used LRC8, 12, 16, or crc16 as
> the error detection algorithm.
> I don't think it used VRC. I did find a refresher that might help, but
> I don't think the polynomial you have for crc 16 has enough terms.
> BUT I could be misremembering.

If you've got the message and the checksum, however computed, there are
free tools to grind through the usual suspects.  I've used it on alien
disk formats very successfully.

--Chuck