Path: utzoo!mnetor!tmsoft!torsqnt!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!usc!elroy.jpl.nasa.gov!decwrl!mcnc!taco!ncsuvx!news From: kdarling@hobbes.ncsu.edu (Kevin Darling) Newsgroups: comp.sys.amiga.hardware Subject: Re: 32bit DMA lockups (Was: More info on A2091 woes) Message-ID: <1991Feb19.121352.11165@ncsuvx.ncsu.edu> Date: 19 Feb 91 12:13:52 GMT References: <555376@neabbs.UUCP> <00077@meph.UUCP> Sender: news@ncsuvx.ncsu.edu (USENET News System) Organization: NCSU Computing Center Lines: 21 gsarff@meph.UUCP (Gary Sarff) writes: >>The 2091 WD reselection thing has been highlighted sufficiently I think. > >I have been seeing messages about this and am curious. We also use the WD33C93A in our 68K computer (not an Amiga). I don't know what the diff is between the A version and previous ones, but at least one reselection bug was documented as far back as 1987... ROM revisions 8 and below for the 3393 part. Could even be that CBM found it. Look under the chip, and there should be a number like xx3393xxD06xP or similar... the 06 is the ROM revision number. Rev 09 supposedly fixed the selection bug, altho there could be revs past that one. Again, I may be mixing apples and oranges here (A and not-A)... I didn't work on the SCSI section except for converting a driver to be interrupt driven. But I seem to recall that the guy who did the hardware, mentioned a known bug. Not much help; sorry. I'll ask him. I know of one company which gave up on the prototype 3393's, but we're happy with the chip so far. best - kev