Apparatus for preventing transferring of data with peripheral de

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395828, 395500, 3642217, 3642302, 3642641, 364DIG1, G06F 1502

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active

055487823

ABSTRACT:
A computer system includes a peripheral device connector interface that automatically identifies the type of peripheral device, if any, coupled to the interface and configures itself for handling data flows to and from peripheral devices of the identified type. The system includes a connector that receives a number of peripheral identification signals that are generated by a peripheral device attached to the connector. Peripheral device data signals, which are also received at the connector, are routed by a connector interface. A number of interface circuits are provided to control the different types of peripheral devices that may be attached to the connector. The interface circuits are coupled to configuration registers that provide operational information for the interface circuits. A transition detector identifies any change in the peripheral identification signals. Any change in the peripheral identification signals corresponds to a change in the peripheral device attached to the connector. In response to a changed peripheral device, an interface disable generator applies a disable signal to the connector interface. A signal decoder is then used to decode the peripheral identification signals so as to identify the peripheral attached to the connector. After the peripheral is identified, configuration data for the peripheral is loaded into the configuration registers.

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IBM Technical Disclosure Bulletin, "Circuits to Allow Cartridge Hot-Plugging", vol. 29, No. 7, Dec. 1986, New York, US, pp. 2877-2878.
IBM Technical Disclosure Bulletin, "Control Circuit for Hot Plugging a ROS Catridge", vol. 29, No. 3, Aug. 1986, New York, US, pp. 1060-1062.

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