Host adaptor comprising a status switching circuit which couples

Details Host adaptor comprising a status switching circuit which couples Host adaptor comprising a status switching circuit which couples

1997-06-09

1999-11-02

An, Meng-Ai T.

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral monitoring

710 7, 710100, 710107, 710127, G06F 1312

Patent

active

059788631

ABSTRACT:
A host adapter for transferring data between a system bus and an input/output (I/O) bus is implemented as an integrated circuit having a data transfer circuit and a status indicator circuit. The status indicator circuit selectively supplies one of a number of status signals from the data transfer circuit as a signal on a status indicator terminal of the host adapter. Therefore, a light emitting diode connected to the status indicator terminal indicates in real time the status of data transfer, such as usage of the system bus, or I/O bus, or execution time of one or more instructions by the host adapter.

REFERENCES:
patent: 4038644 (1977-07-01), Duke et al.
patent: 4419756 (1983-12-01), Cheng-Quispe et al.
patent: 4564794 (1986-01-01), Kilen et al.
patent: 4878166 (1989-10-01), Johnson et al.
Data Book, Preliminary, AIC-7870 PCI Bus Master Single-Chip SCSI Host Adapter, Adaptec, pp. 1-1 through 1-8, 2-1 through 2-31, 8-1 through 8-11, Dec., 1993.
Data Book, Preliminary, AIC-7850 PCI Bus Master Single-Chip SCSI Host Adapter, Adaptec, pp. 1-1 through 1-6, 2-1 through 2-23, 8-1 through 8-11, Feb. 1994.

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