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Automatic Reset Procedure for IBM 3270 Family Display Stations Disclosure Number: IPCOM000034549D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27

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Behrens, LE Rowlance, EJ [+details]


This invention provides for improved operation of IBM 3270 Information Display System displays by forcing a reset after reconnection. A characteristic of the 3274 and 3174 work station control units and the display stations that attach to them is that if the connection between the control unit and the display is broken and then reestablished, the control unit will not reestablish communications with the display until the display station operator causes a power-on-reset (POR) status at the display. This is most often accomplished by powering the display off and back on. This procedure is annoying and was not considered satisfactory error recovery for the IBM 5209 3270-5250 Link Protocol Converter (LPC).