Emerson MVME147 manual Custom Scsi Packets

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CUSTOM SCSI PACKETS

*****************************COMMAND TABLE FOR THE WRITE COMMAND**************

CT2 DC.B %01000000

*X LINK FLAG OFF

*X PARITY CHECKING ENABLED

*X DMA ENABLED

*X CUSTOM SEQ. FLAG=> FIRMWARE CHECKS STATUS

*X FIRMWARE USES SCSI RULES (RESELECT, ETC.)

*X RESERVED.

XNO SCATTER/GATHER X ASYNC SCSI TRANSFER

DC.B 0		RETRY COUNT=0
DC.L 0		NO LINK ADDRESS PROVIDED.
DC.W 6		COMMAND LENGTH = 6 (GROUP 0 COMMAND)
DC.B $0A WRITE COMMAND
DC.B $00		LUN=0, BLOCK ADDR MSB=0
DC.B $00		BLOCK ADDR
DC.B $86		(FULL BLOCK ADDR=$00086)
DC.B $04		4 BLOCKS REQUESTED
DC.B $00		CONTROL BYTE: FLAG BIT=0, LINK BIT=0.
DC.B 00		DON’T CARE
DC.B 00		DON’T CARE
DC.B 00		DON’T CARE
DC.B 00		DON’T CARE
DC.B 00		DON’T CARE
DC.B 00		DON’T CARE
DS.B 01		USER’S STATUS BYTE IS STORED HERE
DC.B 07		SCSI INITIATOR ADDRESS = $07
DC.L $400		4 BLOCKS * $100 BYTES/BLOCK= $400 BYTES
DC.L BUFF		DATA BUFFER ADDRESS
DC.W 1		MESSAGE IN AREA ALLOCATION= 1 BYTE
DC.L MSIN2			MESSAGE IN AREA POINTER
DC.W 1		MESSAGE OUT AREA ALLOCATION = 1 BYTE
DC.L MSOUT2			MESSAGE OUT AREA POINTER
DS.B 342		REMAINING OF THE 384 BYTE COMMAND TABLE
MSIN2	DS.B 1		MESSAGE IN AREA FOR COMMAND TABLE #1
MSOUT2	DC.B $00		NO MESSAGE OUT PHASE FOR THE SECOND

COMMAND.

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