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What are the different modes in that 8255 Programmable Peripheral Interface (PPI) can operate?
- Mode 0: A, B, C simple input or output level sensitive ports
- Mode 1: A, B input or output ports with strobe control in C
- Mode 2: A is bidirectional with control/handshake in B and C
Op code mnemonics: Instructions (statements) in assembly language are usually very simple, unlike those that in high-level languages. Usually, an opcode is a symbol
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Q. What is Missing offset? The xxxx in machine language for instruction at line 0010 is there since the assembler doesn't know DATA segment location which will be determined at
1) Short both I/Ps of NAND gate & use the gate as an inverter. 2) Connect any one of the two I/Ps to VCC & use the remaining I/P & use the gate as an inverter.
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