preservation: linux and ST506/412 - SCSI bridge boards

[Tony Duell]

> 
> 
> On 6/26/2006 at 1:01 AM Jules Richardson wrote:
> 
> >Out of interest, has anyone else ever managed to persuade linux to talk
> >to any 
> >of the Xebec/Omti/Emulex/Adaptec ST506-SCSI bridge boards? Most of the
> >boards 
> >are SASI, or at best semi-SCSI, so Linux refuses to talk to them.
> 
> Well, the firmware on the OMTI boards is in EPROM and the CPU's a Z8--it
> shouldn't be too difficult to add an IDENTIFY command to it.  I seem to

For the OMTI 5000 series boards, there were actually data sheets for the 
3 custom chips (IIRC they were a buffer memory controller, the actual 
data encoder/decoder and a VFO/PLL/data separator thein). Those data 
sheets did (IIRC) document the various registers in the chips. So it 
should be possible to completely understand the firmware.

-tony