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Slide 1Dr A Sahu Dept of Comp Sc & Engg. IIT Guwahati Slide 2 Hierarchy of I/O Control Devices 8155 I/O + Timer 8155 I/O + Timer 8255 I/O 8255 I/O 8253/54 Timer 8253/54…

1. Dr A Sahu Dept of Computer Science & Engineering IIT Guwahati 2. Hierarchy of I/O Control Devices 8155 I/O + Timer 8255 I/O 8253/54 Timer 2 Port (A,B), No Bidirectional…

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USER’S GUIDE A32R-9561-01A i Approval Information and Compilation and Publication Notice THIS EQUIPMENT IS DESIGNED TO WORK WITH A TWO WIRE ANALOGUE PSTN LINE FITTED WITH…