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Assembly Language
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What is the use of ALE

The ALE is used to latch the lower order address so that it can be available in T2 and T3 and used for identifying the memory address. During T1 the ALE goes high, the latch is transparent ie, the output changes according to the input data, so the ou...
Posted By:Isaac Evans      Posted On: Oct 01

Assembly Language
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How many machine cycles does 8085 have?

The 8085 have seven machine cycles. They are
- Opcode fetch
- Memory read
- Memory write
- I/O read
- I/O write
- Interrupt acknowledge
- Bus idle
Posted By:Adalicia Fischer      Posted On: Nov 08

Assembly Language
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Explain the signals HOLD, READY and SID

HOLD indicates that a peripheral such as DMA controller is requesting the use of address bus, data bus and control bus. READY is used to delay the microprocessor read or write cycles until a slow responding peripheral is ready to send or accept data....
Posted By:Sophie Campbell      Posted On: Nov 11

Assembly Language
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Mention the categories of instruction and give two examples for each category.

The instructions of 8085 can be categorized into the following five categories
- Data transfer Instructions -MOV Rd,Rs STA 16-bit
- Arithmetic
- Instructions -ADD R DCR M
- Logical
- Instructions -XRI 8-bit RAR
- Branching
- Instructions -JNZ ...
Posted By:Kai Evans      Posted On: Jan 12

Assembly Language
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Explain LDA, STA and DAA instructions

LDA copies the data byte into accumulator from the memory location specified by the 16-bit address. STA copies the data byte from the accumulator in the memory location specified by 16-bit address. DAA changes the contents of the accumulator from bin...
Posted By:Adelina Fischer      Posted On: Mar 31

Assembly Language
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Explain the different instruction formats with examples

The instruction set is grouped into the following formats
- One byte instruction -MOV C,A
- Two byte instruction -MVI A,39H
- Three byte instruction -JMP 2345H
Posted By:Lily Brown      Posted On: Oct 21

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