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Emerson MVME147 manual Target Role Routines

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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TARGET ROLE ROUTINES

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Emerson MVME147 manual Target Role Routines

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Contents

Features GENERAL INFORMATIONIntroduction Modes of Operation MVME147 SCSI Firmware Entry Points The SCSI firmware initializes these vectors Equipment Supported CONTROLLE CONTROLLE Devices Supported Under Common Command Set Related Documentation MOTOROLADOCUMENT TITLE PUBLICATION NUMBER Manual Terminology GENERAL INFORMATION CUSTOM SCSI PACKETS Initiator Role Custom Packet 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 NOTES Status from SCSI TARGET Enable Custom Packet TARGET Sequence Custom Packet TARGET Sequence Custom Packet CUSTOM SCSI PACKETS 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 Control Flags PACKET RETURN STATUSPacket Return Status SCSI Bit 3 FM Filemark Bit 4 COMMAND RETRY 1 = Retries were performed Bit 5 COMMAND REThe command was retried retry count times Packet Return Status Bit 2 EOM End of media PACKET RETURN STATUS Table 3-1.Packet Status Codes Intermediate ReturnCodes MEANING Final Return Codes Table 3-2.Packet Status Codes cont’d SCSI Bus Reset Packet section in Chapter Controller-Dependent Request-Sense-Data Error-Class7 CodesTable 3-3.Packet Status Codes cont’d SCSI Status Returned in Status Phase Table 3-4.Packet Status Codes cont’d Request-Sense-Data Error-Class0 through 6 Codes Table 3-5.Packet Status Codes cont’dPage PACKET RETURN STATUS SCSI FIRMWARE INTERRUPT STRUCTURE SCSI Firmware Interrupt Structure SCSI FIRMWARE INTERRUPT STRUCTURE WRITING A DRIVER SCSI_CMDSCSI ACTV SCSI_INT Passing Commands to the SCSI Firmware Building the PacketInterface 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 TARGET ROLE ROUTINES MVME147 SCSI Firmware Background SCSI Versus SASI Rules Custom Sequence Packet Command Table Script 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 SCSI PACKETS Table 7-1.SCSI FunctionsFUNCTION CODE DESCRIPTION SCSI Functions cont’d Read/Write PacketTable DISK and TAPE Controller logical unit in SG table, if zero Old Packet Supported for Compatibility +$12 in SG table, if zero DMA Scatter/Gather Table Entry |function code 3 bits1 = link to next entryFor example $5 is DMA MEMORY ADDRESS 32-BIT COMMAND Attach/Detach Packet all devicesCOMMAND 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 = 3½, 5¼, Example for floppy3½, 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 SCSI Controller Reset Packet Erase 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 The table below shows the write filemarks packet Write Filemarks PacketWrite Filemarks Packet Controller logical unit Verify CRC Packet The controller must be in general or read mode 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 BYTE COMMON COMMAND SET AND DISK OPERATIONBYTE OFFSET BYTE OFFSET ENTRY NUMBER COMMON COMMAND SET AND DISK OPERATION Send mode select command COMMON COMMAND SET AND DISK OPERATION FORMAT BITS DEFECT LISTDEFECT LIST TYPE Mode Select Header Block Descriptor COMMON COMMAND SET AND DISK OPERATION BYTE OFFSET BYTE OFFSET Mode Select HeaderBlock Descriptor BYTE OFFSET BYTE OFFSET BYTE OFFSETNOTES VALUE Mode Select Command CDB BYTE OFFSETVALUE COMMENTS COMMON COMMAND SET AND DISK OPERATION BYTE OFFSETMode Select Header Block Descriptor Page code BYTE OFFSETBYTE OFFSET BYTE OFFSET ATTRIBUTE FLAGS MEDIATYPE ALL SECTORS COMMON COMMAND SET AND DISK OPERATION ATTRIBUTE FLAGSMEDIA TYPE BYTE OFFSET PIN 34 CONTROL Pin 2 and Pin 34 Definition for High DensityPin 2 and Pin 34 Definition for Low Density PIN 2 CONTROL PIN 34 CONTROL A-22

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