On Wed, Jan 8, 2020 at 4:44 PM jim stephens via cctalk < [email protected]> wrote:
> The electronics of the SCSI interface were designed initially by the > precursor to Adaptec. At the time that the SCSI committee was formed, > there was work by a number of companies. Among them were HP, and the like. > There was no one common electronic design for SCSI. The electronic designs were unique to many companies. The earliest implementations were board-level interfaces consisting mostly of TTL. Early single-chip implementations included those from NCR and Adaptec, though many others came later. While there were many companies involved in the standardization of SCSI, the original SCSI 1 specification, ANSI X3.131-1986, was a relatively minor elaboration on SASI, which had been developed exclusively by Shugart Associates, hence the name SASI being an acronym of Shugart Associates System Interface. Shugart Associates was an early maker of 8 inch floppy drives and invented the 5 1/4 inch floppy.
