Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!jarthur!nntp-server.caltech.edu!madler From: madler@nntp-server.caltech.edu (Mark Adler) Newsgroups: comp.sys.next Subject: Re: floppy options Message-ID: <1991May14.052511.29927@nntp-server.caltech.edu> Date: 14 May 91 05:25:11 GMT References: <1991May13.214125.26544@nntp-server.caltech.edu> <1991May14.045135.21287@agate.berkeley.edu> Distribution: comp Organization: California Institute of Technology, Pasadena Lines: 26 Izumi Ohzawa believes: >> Wait. As I understand it. The PLI drive and other external floppy >> drives are SCSI devices, while Sony MPX-111N is NOT. >> Therefore, I don't think you can plug in the bare drive used >> in PLI to the socket on the 68040 CPU board. The socket for the floppy on the 040 CPU board is not a SCSI port--it is for a raw drive since it goes to an Intel N82077-1 floppy controller chip. Externally, the PLI SuperFloppy 2.8 is a SCSI floppy drive. However, there is a good-sized circuit board inside to interface the raw floppy drive to the SCSI port. This board has a Z8 processor, 32K of ram, 16K of rom, a Zilog SCSI controller chip, and an Intel N82077-1 floppy controller chip--the same one used on my 040 cpu board. The drive, which is a Sony MP-F40W-1Y, connects to this board using the same connector (34-pin berg) as the socket on my 040 board. It seems quite clear that the floppy in the PLI drive is much like, if not identical to, the internal NeXT floppy drives. One of these days I'll plug the puppy in there and see what happens. Mark Adler madler@pooh.caltech.edu