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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
write an assembly language program that has two subroutines : one for encrypting alphabates of a string and second fo decrypting the encoded string . in encryption simply converta
Print Media Advertising (PMA) has been providing a contract to market Buzz Cola via newspaper ads in a main southern newspaper. Full-page ads in the weekday editions (Monday throug
1. Start your program at address $8500. To do this you need to inform the assembler, through the EQU and ORG assembler directives, that you want your program to start at $8500. Thi
ADD: Add :- This instruction adds an immediate contents of a memory location specified in the a register ( source ) or instruction to the contents of another register (destinat
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
SHORT : The SHORT operator denoted to the assembler that only one byte is needed to code the displacement for a jump (for example displacement is within -128 to +127 bytes fr
Convert 751 to hex and show what it would look like stored at TheNumber WORD ? (hint: answer in hex pairs)
Overview of Intel Pro-Pentium : The 2 chief players in the PC CPU market are Motorola and Intel. Intel has enjoyed incredible success with its processors since the early 1980
need some project ideas
The 486 Introduced in the year 1989 the 80486 did not feature any radically new processor technology. Instead, it joints a 386 processor, a cache memory controller and a math c
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