Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!van-bc!rsoft!mindlink!a186
From: Harvey_Taylor@mindlink.bc.ca (Harvey Taylor)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: SCSI Direct
Message-ID: <6101@mindlink.bc.ca>
Date: 2 Jun 91 02:30:36 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 38


    Thankyou to the several folks who answered my earlier questions
 re SCSI Direct. It turns out I was confusing the LUN & the SCSI ID
 & mucking up the CDB. Once I figured out what Inquiry was telling
 me, it was apparent.
    Meanwhile I am still having troubles with MODE_SELECT, SEND_DIAGNOSTIC
 - RECEIVE_DIAGNOSTIC_RESULTS pair & FORMAT. Usually I get ILLEGAL REQUEST
 (or HARDWARE ERROR if I diddle with the Amiga structs).
    Before I get too far into this; I am using an A2000, Xetec FastTrak
 (version 1.48) & a TEAC FD-235JS Scsi floppy. The documentation which I
 don't have, BTW, is for the TEAC controller.

    I am trying to puzzle out the possible failure modes.
    -There may be a problem with the Xetec driver.
    -There may be a problem with the drive hardware. (But it passes
 SEND_DIAGNOSTIC with the Self Test bit set.)
    -There may be some problem with the CDBs I am sending to the
 FC-1. (More likely.)
    -There may be some problem with the sequence of CDBs I send.
    -Maybe I am mucking up the SCSI_CMD & IoRequestBlock.
    -Other failure modes?

    Does anybody know if the Xetec FastTrak SCSI Direct works properly?
 I haven't noticed any effect of setting SCSIF_AUTOSENSE ie. nothing in the
 SenseData buffer.
    To send MODE_SELECT, I have been writing my parameter list to a buffer
 putting the address in scsi_Data, setting the scsi_Flags to SCSIF_WRITE.
 Sound right?
    I suspect I will have to wait for the TEAC docs I ordered to arrive...
 <sigh>
    -het

  "Abstract words are ancient coins whose concrete images in the
    give and take of talk have worn away." -Julian Jaynes

 Harvey Taylor      Meta Media Productions
 uunet!van-bc!rsoft!mindlink!Harvey_Taylor
            a186@mindlink.bc.ca