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- {
- SCSIDisk.i for PCQ Pascal
-
- SCSI exec-level device command
- }
-
- {--------------------------------------------------------------------
- *
- * SCSI Command
- * Several Amiga SCSI controller manufacturers are converging on
- * standard ways to talk to their controllers. This include
- * file describes an exec-device command (e.g. for hddisk.device)
- * that can be used to issue SCSI commands
- *
- * UNIT NUMBERS
- * Unit numbers to the OpenDevice call have encoded in them which
- * SCSI device is being referred to. The three decimal digits of
- * the unit number refer to the SCSI Target ID (bus address) in
- * the 1's digit, the SCSI logical unit (LUN) in the 10's digit,
- * and the controller board in the 100's digit.
- *
- * Examples:
- * 0 drive at address 0
- * 12 LUN 1 on multiple drive controller at address 2
- * 104 second controller board, address 4
- * 88 not valid: both logical units and addresses
- * range from 0..7.
- *
- * CAVEATS
- * Original 2090 code did not support this command.
- *
- * Commodore 2090/2090A unit numbers are different. The SCSI
- * logical unit is the 100's digit, and the SCSI Target ID
- * is a permuted 1's digit: Target ID 0..6 maps to unit 3..9
- * (7 is reserved for the controller).
- *
- * Examples:
- * 3 drive at address 0
- * 109 drive at address 6, logical unit 1
- * 1 not valid: this is not a SCSI unit. Perhaps
- * it's an ST506 unit.
- *
- * Some controller boards generate a unique name (e.g. 2090A's
- * iddisk.device) for the second controller board, instead of
- * implementing the 100's digit.
- *
- * There are optional restrictions on the alignment, bus
- * accessability, and size of the data for the data phase.
- * Be conservative to work with all manufacturer's controllers.
- *
- *------------------------------------------------------------------}
-
- Const
-
- HD_SCSICMD = 28; { issue a SCSI command to the unit }
- { io_Data points to a SCSICmd }
- { io_Length is sizeof(struct SCSICmd) }
- { io_Actual and io_Offset are not used }
-
- Type
-
- SCSICmd = record
- scsi_Data : Address; { word aligned data for SCSI Data Phase }
- { (optional) data need not be byte aligned }
- { (optional) data need not be bus accessable }
- scsi_Length : Integer; { even length of Data area }
- { (optional) data can have odd length }
- { (optional) data length can be > 2**24 }
- scsi_Actual : Integer; { actual Data used }
- scsi_Command : Address; { SCSI Command (same options as scsi_Data) }
- scsi_CmdLength : Short; { length of Command }
- scsi_CmdActual : Short; { actual Command used }
- scsi_Flags : Byte; { includes intended data direction }
- scsi_Status : Byte; { SCSI status of command }
- scsi_SenseData : String; { sense data: filled IF SCSIF_[OLD]AUTOSENSE }
- { is set AND scsi_Status has CHECK CONDITION }
- { (bit 1) set }
- scsi_SenseLength : Short; { size of scsi_SenseData, also bytes to }
- { request w/ SCSIF_AUTOSENSE, must be 4..255 }
- scsi_SenseActual : Short; { amount actually fetched (0 means no sense) }
- end;
- SCSICmdPtr = ^SCSICmd;
-
-
- Const
-
- {----- scsi_Flags -----}
- SCSIF_WRITE = 0; { intended data direction is out }
- SCSIF_READ = 1; { intended data direction is in }
- SCSIB_READ_WRITE = 0; { (the bit to test) }
-
- SCSIF_NOSENSE = 0; { no automatic request sense }
- SCSIF_AUTOSENSE = 2; { do standard extended request sense }
- { on check condition }
- SCSIF_OLDAUTOSENSE = 6; { do 4 byte non-extended request }
- { sense on check condition }
- SCSIB_AUTOSENSE = 1; { (the bit to test) }
- SCSIB_OLDAUTOSENSE = 2; { (the bit to test) }
-
-
- {----- SCSI io_Error values -----}
- HFERR_SelfUnit = 40; { cannot issue SCSI command to self }
- HFERR_DMA = 41; { DMA error }
- HFERR_Phase = 42; { illegal or unexpected SCSI phase }
- HFERR_Parity = 43; { SCSI parity error }
- HFERR_SelTimeout = 44; { Select timed out }
- HFERR_BadStatus = 45; { status and/or sense error }
-
- {----- OpenDevice io_Error values -----}
- HFERR_NoBoard = 50; { Open failed for non-existant board }
-
-