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The Intel 8255A is a general purpose programmable I/O device which is

The Intel 8255A is a general purpose programmable I/O device which is designed for use with all Intel and most other microprocessors. It provides 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation.

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The Intel 8255A is a general purpose programmable I/O device which is

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  1. The Intel 8255A is a general purpose programmable I/O device which is designed for use with all Intel and most other microprocessors. It provides 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation. The 8255 is a 40 pin integrated circuit (IC), designed The 8255 is a 40 pin IC designed by Intel for the 8080 microprocessor.

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