Method of flagging the completion of a second command before the

Details Method of flagging the completion of a second command before the Method of flagging the completion of a second command before the

1995-06-05

1997-02-11

Lee, Thomas C.

Boots, shoes, and leggings

395439, 395739, 395825, 364231, 3642362, 3642383, 3642421, 3642481, 360 9701, G06F 1300, G06F 1320

Patent

active

056030665

ABSTRACT:
A hard disk controller integrated circuit of a SCSI target device comprises a sequencer which causes a SCSI bus to transition from a command bus phase to a data transfer bus phase during execution of an autoread or an autowrite SCSI command without waiting for a communication from a microprocessor of the SCSI target device. In some embodiments, the command is determined to be either an autotransfer command or a non-autotransfer command. If the command is a non-autotransfer command, then the sequencer does not proceed directly to the data transfer phase but rather requires microprocessor intervention before proceeding to the data transfer phase. In some embodiments, an autotransfer command (such as an autoread or an autowrite command) is carried out by the disk drive controller integrated circuit with only two interrupts being generated to the microprocessor: one after receiving the autotransfer command from the initiator; and one after data transfer of the autotransfer command is complete. The hard disk controller integrated circuit automatically sends the status byte and command complete message if there is no potential queue tag collision as indicated by a cleared tag not okay flag.

REFERENCES:
patent: 4142234 (1979-02-01), Bean et al.
patent: 4503499 (1985-03-01), Mason et al.
patent: 4815030 (1989-03-01), Cross et al.
patent: 4843544 (1989-07-01), DuLac et al.
patent: 4901232 (1990-02-01), Harrington et al.
patent: 4965801 (1990-10-01), DuLac
patent: 5022059 (1991-06-01), Arai
patent: 5129072 (1992-07-01), Larner et al.
patent: 5195100 (1993-03-01), Katz et al.
patent: 5230048 (1993-07-01), Moy
patent: 5233692 (1993-08-01), Gajjar et al.
patent: 5247665 (1993-09-01), Matsuda et al.
patent: 5274783 (1993-12-01), House et al.
patent: 5325510 (1994-06-01), Frazier
patent: 5367647 (1994-11-01), Coulson et al.
patent: 5379379 (1995-01-01), Becker et al.
patent: 5404549 (1995-04-01), Tauscheck
patent: 5421014 (1995-05-01), Bucher
patent: 5450546 (1995-09-01), Krakirian
patent: 5454085 (1995-09-01), Gajjar et al.
patent: 5463743 (1995-10-01), Galloway
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.

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