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Emerson MVME147 manual Recover Buffer Data Packet

Models: MVME147

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SCSI Bus Reset Packet Command Table Phase Recover Buffer Data Packet Features TARGET Enable Custom Packet

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Emerson MVME147 manual Recover Buffer Data Packet

Page 140 Page 142

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Contents

GENERAL INFORMATION FeaturesIntroduction Modes of Operation MVME147 SCSI Firmware Entry Points The SCSI firmware initializes these vectors Equipment Supported CONTROLLE CONTROLLE Devices Supported Under Common Command Set MOTOROLA Related DocumentationDOCUMENT TITLE PUBLICATION NUMBER Manual Terminology GENERAL INFORMATION Initiator Role Custom Packet CUSTOM SCSI PACKETS CUSTOM SCSI PACKETS Initiator Role Custom Packet Page PHASE CODE Initiator Role Custom Packet +$00 +$68 status Note ASYNC the firmware status xxxxxxxx xxxxxxxx Page CUSTOM SCSI PACKETS Initiator Role Custom Packet CUSTOM SCSI PACKETS TARGET Enable Custom Packet TARGET Enable Custom Packet Status from SCSI NOTES TARGET Enable Custom Packet TARGET Sequence Custom Packet TARGET Sequence Custom Packet NOTES TARGET Sequence Custom Packet WORDS $04 and $06 CUSTOM SCSI PACKETS TARGET Sequence Custom Packet CUSTOM SCSI PACKETS RETRY COUNT. Not used by the TARGET role firmware CUSTOM SCSI PACKETS PACKET RETURN STATUS Packet Return StatusControl Flags SCSI 1 = Retries were performed Bit 5 COMMAND RE Bit 3 FM Filemark Bit 4 COMMAND RETRYThe command was retried retry count times Packet Return Status Bit 2 EOM End of media PACKET RETURN STATUS Intermediate Return Table 3-1.Packet Status CodesCodes MEANING Final Return Codes SCSI Bus Reset Packet section in Chapter Table 3-2.Packet Status Codes cont’d Request-Sense-Data Error-Class7 Codes Table 3-3.Packet Status Codes cont’dController-Dependent Table 3-4.Packet Status Codes cont’d SCSI Status Returned in Status Phase Table 3-5.Packet Status Codes cont’d Request-Sense-Data Error-Class0 through 6 CodesPage PACKET RETURN STATUS SCSI Firmware Interrupt Structure SCSI FIRMWARE INTERRUPT STRUCTURE SCSI FIRMWARE INTERRUPT STRUCTURE SCSI_CMD WRITING A DRIVERSCSI ACTV SCSI_INT Building the Packet Passing Commands to the SCSI FirmwareInterface Rules for the SCSI Firmware Figure 5-1.SCSI Disk Driver Interface to VERSAdos Interface Rules for Multiple Callers WRITING A DRIVER Care must be taken not to modify the contents of WRITING A DRIVER Interface Rules for the SCSI Firmware FUNNEL WRITING A DRIVER Interface Rules for the SCSI Firmware WRITING A DRIVER MOVE.W 2A2,D0 THE CODE BELOW HANDLES FINAL RETURN CODES Interface Rules for a Single Caller WRITING A DRIVER MVME147 SCSI Firmware Background TARGET ROLE ROUTINES Custom Sequence Packet SCSI Versus SASI Rules Script Command Table Enabling TARGET Role Enabling TARGET Role Servicing the TARGET Requests Servicing the TARGET Requests TARGET ROLE ROUTINES Servicing the TARGET Requests TARGET ROLE ROUTINES Servicing the TARGET Requests TARGET ROLE ROUTINES Table 7-1.SCSI Functions SCSI PACKETSFUNCTION CODE DESCRIPTION Read/Write Packet TableSCSI Functions cont’d DISK and TAPE Controller logical unit in SG table, if zero Old Packet Supported for Compatibility +$12 in SG table, if zero |function code 3 bits DMA Scatter/Gather Table Entry1 = link to next entryFor example $5 is DMA MEMORY ADDRESS 32-BIT Attach/Detach Packet all devices COMMANDCOMMAND CONTROLLER Attach/Detach Packet all devices SCSI PACKETS +$1E FM encoding, single Controller type refer xxxxxxxx attributes byte offset +$20 Single track density Drive type 0 = Example for floppy 3½, 5¼3½, 5¼, 250K B/S Data +$04 Minimum read QIC-24 if this is set to 0, the +$00 Reserved Interrupt level +$00 +$9E $00 Format Packet Assign Alternate Sector Packet SCSI +$0E Assign Alternate Sector Packet SCSI DEFECT LIST TYPE 0 Note 3, Head Bytes from Index MSW Note SCSI Bus Reset Packet Controller logical unit Erase Packet SCSI Controller Reset Packet +$12 Rewind Packet Device logical unit Read Block Limits Packet SCSI PACKETS where n = number of blocks or filemarks to Space Status from SCSI Write Filemarks Packet Write Filemarks PacketThe table below shows the write filemarks packet Controller logical unit The controller must be in general or read mode Verify CRC Packet Tape Mode Select/Sense Packet Tape Mode Select/Sense Packet Number of tracks on Inquiry Packet +$00 Reserved +$1A Load/Unload Packet +$14 Recover Buffer Data Packet +$0C Request Sense Data Packet Controller logical unit Check Status Packet Open Packet Open Packet SCSI PACKETS COMMON COMMAND SET AND DISK OPERATION BYTE OFFSETBYTE BYTE ENTRY NUMBER NOTES Send mode select command COMMON COMMAND SET AND DISK OPERATION DEFECT LIST DEFECT LIST TYPEFORMAT BITS Mode Select Header Block Descriptor BYTE OFFSET COMMON COMMAND SET AND DISK OPERATION Mode Select Header BYTE OFFSETBlock Descriptor BYTE OFFSET BYTE OFFSET BYTE OFFSETNOTES VALUE BYTE OFFSET Mode Select Command CDBVALUE COMMENTS BYTE OFFSET COMMON COMMAND SET AND DISK OPERATIONMode Select Header Block Descriptor BYTE OFFSET BYTE OFFSETPage code COMMON COMMAND SET AND DISK OPERATION MEDIA ATTRIBUTE FLAGSTYPE ALL SECTORS ATTRIBUTE FLAGS COMMON COMMAND SET AND DISK OPERATIONMEDIA TYPE BYTE OFFSET Pin 2 and Pin 34 Definition for High Density PIN 34 CONTROLPin 2 and Pin 34 Definition for Low Density PIN 2 CONTROL PIN 2 CONTROL A-22

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