Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!van-bc!rsoft!mindlink!a186
From: Harvey_Taylor@mindlink.bc.ca (Harvey Taylor)
Newsgroups: comp.sys.amiga.programmer
Subject: SCSI Direct
Message-ID: <5909@mindlink.bc.ca>
Date: 17 May 91 03:14:24 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 72


    I've been playing with SCSI Direct lately (without documentation)
 & I have some questions. I am trying to talk to a TEAC scsi floppy from
 a Xetec MiniFastCard. These are my results so far.
*
*************************************************************
*       SCSI Commands                   RESULTS
*
*       TEST_UNIT_READY                 $2D BadStatus
*       REQUEST_SENSE                   $2D BadStatus
*       INQUIRY                         $00 TEAC info REV etc
*       READ_CAPACITY                   $2C SelTimeout
*       MODE_SELECT                     $2D BadStatus
*       FORMAT                          $2D BadStatus
*       SEND DIAGNOSTIC  (Self Test)    $2C SelTimeout
*
*       SEND DIAGNOSTIC                 $2C SelTimeout
*       RECEIVE DIAGNOSTIC RESULTS      GURU
*************************************************************
*
    Does anybody happen to know a mapping between the result codes
 & more specific device info? ie. What do all those damn BadStatus results
 mean?

HFERR_SelfUnit          EQU     $00000028
HFERR_DMA               EQU     $00000029
HFERR_Phase             EQU     $0000002A
HFERR_Parity            EQU     $0000002B
HFERR_SelTimeout        EQU     $0000002C
HFERR_BadStatus         EQU     $0000002D
HFERR_NoBoard           EQU     $00000032

    In a .hdr file with the Xetec stuff they show their SCSI_CMD
 structure as having a few more fields than the CBM version.
 Specifically:
*
SCSICmd                 EQU     $00000000
scsi_Data               EQU     $00000000
scsi_Length             EQU     $00000004
scsi_Actual             EQU     $00000008
scsi_Command            EQU     $0000000C
scsi_CmdLength          EQU     $00000010
scsi_CmdActual          EQU     $00000012
scsi_Flags              EQU     $00000014
scsi_Status             EQU     $00000015
*
* Xetec extra below
*
scsi_SenseData          EQU     $00000016
scsi_SenseLength        EQU     $0000001A
scsi_SenseActual        EQU     $0000001C
*
*
    Is anybody else using these? GVP? MicroBotics? Has the CBM spec grown
 or is it just Xetec?
    Finally, in the SCSI_CMD structure, scsi_Flags field what is the
 meaning of (particularly AutoSense):

SCSIF_WRITE             EQU     $00000000
SCSIF_READ              EQU     $00000001
SCSIF_AUTOSENSE         EQU     $00000002

    Any info or thoughts you have would be appreciated.
    -het

   "With the first link, a chain is forged.
    The first speech censured, the first thought forbidden,
    the first freedom denied, chains us all irrevocably." - Satie

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