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The port that is used for the generation of handshake lines in mode 1 or mode 2 is

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in Microprocessor by (39.4k points)
The port that is used for the generation of handshake lines in mode 1 or mode 2 is

(a) port A

(b) port B

(c) port C Lower

(d) port C Upper

The question was posed to me during an online interview.

Question is from PIO 8255 (Programmable Input in division Basic Peripherals and their Interfacing with 8086/88 of Microprocessor

1 Answer

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by (49.2k points)
The correct answer is (d) port C Upper

Easiest explanation: Port C upper is used for the generation of handshake lines in mode 1 or mode 2.

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