High speed IEEE 488 bus interface system and method

Details High speed IEEE 488 bus interface system and method High speed IEEE 488 bus interface system and method

1992-05-27

1994-05-24

Evans, Arthur G.

Boots, shoes, and leggings

3642403, 3642405, 3642394, 395250, 395275, 395325, G06F 1300

Patent

active

053157060

ABSTRACT:
A modified IEEE 488.1 bus interface increases, by as much as a factor of eight, the rate at which inter-instrument data transfers can be performed. The bus interface state machines presented in the ANSI/IEEE Std 488.1-1987 have been modified so that if all the devices involved in a particular data transfer are equipped to handle high speed data transfers, then a modified data transmission methodology is used so as to enable multiline messages to be transmitted at a higher speed than would otherwise be possible. If any of the devices involved in a particular data transfer does not have an interface equipped to handle high speed data transfers, this condition is automatically detected by the interfaces with high speed capability, and then the standard data transmission methodology is used. The high speed data transmission mode is totally transparent to the controller software in that it does not require any changes to the controller software nor to the device drivers and device application programs.

REFERENCES:
patent: 4507740 (1985-03-01), Star et al.
patent: 4710893 (1987-12-01), McCutcheon et al.
patent: 4982325 (1991-01-01), Tignor et al.
patent: 5109490 (1992-04-01), Arimilli et al.
"IEEE Standard Digital Interface for Programmable Instrumentation"; ANSI/IEEE Std 488.1-1987; Jun. 16, 1988 (Revision of ANSI/IEEE Std. 488-1978).

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