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DMA
HOW DMA WORKS to transfer data from memory to a peripheral:
1. The peripheral Device requests for DMA service by pulling DREQ line high
2. The DMA controller requests CPU go on hold by pulling CPU's HRQ line high
3. The CPU finished current bus cycle, then acknowledges with HLDA the CPU relinquishes ALL bus control now (3-state)
4. The DMA controller activates DACK line to acknowledge the DMA to the peripheral
5. The DMA start transferring data to the peripheral
1 st Generation Microprocessor : At the end of the 70s a group of engineers developed a chip is able to processing data. This chip was called processor chip. Big processors w
OR: Logical OR: The OR instruction carries out the OR operation in the similar way as described in case of the AND operation. The restriction on source and destination operands ar
program on basic calculator
Can any one assist me with this program. I am not efficient with assembly language and I need assistance badly. I am not asking anyone to do my work I just need help step by step
REP : Repeat Instruction Prefix :- This instruction is utilized as a prefix to other instructions. The instruction in which the REP prefix is provided, is executed repetitively
1. Assembly code for the flow chart we did in the class about the simple I/O interface driver 2. Enhanced driver (flow chart and its assembly code) to cater for interruptions in th
This is a short program to practice assembly language loops and if/else statements. You will use various jump commands and the cmp instruction. The program will generate a random
General Bus Operation The 8086 has a joined data and address bus commonly referred to as a time multiplexed address and data bus. The major reason behind multiplexing address
Convert 751 to hex and show what it would look like stored at TheNumber WORD ? (hint: answer in hex pairs)
to separate positive and negative numbers
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