Patent
1994-03-01
1996-04-02
Robertson, David L.
395825, G06F 930
Patent
active
055048684
ABSTRACT:
A hard disk controller integrated circuit of a SCSI target device comprises a dedicated command descriptor block "CDB" parsing state machine. The dedicated CDB parsing state machine parses incoming six-byte, ten-byte and twelve-byte SCSI command descriptor blocks and writes information from corresponding fields in the six-byte, ten-byte and twelve-byte SCSI command descriptor blocks into predetermined memory locations. In some embodiments, there are sixteen such predetermined memory locations which together comprise a 16.times.8 register file. A microprocessor coupled to the hard disk controller integrated circuit is therefore relieved of the burden of parsing incoming SCSI command descriptor blocks.
REFERENCES:
patent: 4843544 (1989-06-01), DuLac et al.
patent: 4965801 (1990-10-01), DuLac
patent: 5249279 (1993-09-01), Schmenk et al.
Data Sheet, Jan. 1994, "AIC-7110 High-Performance Integrated SCSI Mass Storage Controller", Adaptec, Inc., pp. i-140.
Preliminary Data Sheet, Apr. 1993, "AIC-8210 Dual-Bit Automated High-Performance SCSI Controller IC", Adaptec, Inc., pp. i-288.
"Fast Track to SCSI--A Product Guide", Fujitsu Microelectronics, Inc., Integrated Circuits Division, Prentice-Hall, Inc., 1991, pp. iii Through Index-7.
Adaptec, Incorporated
Robertson David L.
Wallace T. Lester
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