Adaptec AIC-010 / AIC-100 ECC scheme

Hi guys, I've managed to get my grubby paws on a Seagate ST22R RLL controller, and a matching ST-277R-1 hard drive (half-height 5.25in, 60MB ish). As part of my "pre-installation research", I Googled the part number of the one apparently-non-Seagate-custom part on the ST22R -- an Adaptec AIC-010 RLL controller. Turns out the datasheet for this part is on Bitsavers too. The datasheet provides a decent overview of the on-disc format (specifically: it's a tweaked variant of the IBM floppy disc low-level format, sitting on top of (2,7)RLL). What it doesn't really cover is the 32-bit error-correction code and its polynomial. There is a slightly oblique reference to Fire codes, there are two polynomials (forward and reverse), and data is loaded in shift-register style. Does anyone know what sort of error-correction codes were used on the AIC-010 and AIC-100 controller chips, or the polynomials used? Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/