Transmission method of changing protocol and data processing app

Details Transmission method of changing protocol and data processing app Transmission method of changing protocol and data processing app

1996-03-21

1998-05-05

Harrity, John E.

Boots, shoes, and leggings

395500, 3642408, 364DIG1, G06F 1342

Patent

active

057489157

ABSTRACT:
As a method for transferring data between a first data processing apparatus and a second data processing apparatus connected thereto attachably and detachably, there is provided a transmission method of changing protocol having a step for transmitting a first request signal from the first data processing apparatus to the second data processing apparatus, based on a first protocol, for requesting a change from the first protocol to second protocol, a second transmission step for transmitting, when no first response signals to the first request signal are received from the second data processing apparatus, a second request signal to the second data processing apparatus, based on the second protocol, for requesting the change from the first to the second protocol, and a step for determining, in accordance with receiving of a second response signal to the second request signal from the second data processing apparatus, whether data transfer between the apparatuses should be executed or not. There is also provided a data processing apparatus using this method.

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ISO/JTC1/SC 17/WG 4 N 416, ISO "Appreciation to KTAS", Jul. 1988.

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