> -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jules > Richardson via cctalk > Sent: 10 October 2017 12:22 > To: cctalk@classiccmp.org > Subject: Re: The origin of SCSI [WAS:RE: The origin of the phrases ATA and > IDE ] > > On 10/09/2017 12:52 PM, Chuck Guzis via cctalk wrote: > > On 10/09/2017 06:52 AM, Jules Richardson via cctalk wrote: > > > >> My understanding there is that true SASI supports just a single > >> target, and so there's no selection phase like there is with SCSI > >> (and SCSI provides an extra signal on the connector uses during > >> selection, which simply isn't there with SASI). However, there seemed > >> to be some significant overlap and blurring of lines between SCSI and > >> SASI, such that some early devices calling themselves SCSI aren't > >> quite - and it's possible that some hardware which talks about SASI > >> actually behaves more like SCSI. > > > > I'm not entirely sure about that--the PC Megastore contained both a > > disk and a tape drive. So more than a single device. > > Yes, looking at the Xebec S1410A manual it talks about multiple boards on the > SASI bus, so that appears to be bit rot on my part - I must be thinking of > something which predated SASI. > > Having said that, I think that some bridge boards were capable of driving both > a ST506/412-type disk and QIC tape, so that particular setup wasn't unheard > of, although most bridges handled disk only. > > cheers > > Jules
I am pretty sure I had a XEBEC SASI board that would run as SCSI and had 2 x MFM drives as 2 x LUNS onto a single SCSi address... ... on my ATARI ... Dave
