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DMA controller :
Steps include in transferring a block of data from I/O devices (for example a disk) to memory:
1. CPU sends a signal to initiate disk transfer through I/O interface
2. CPU sends starting address of the block
3. Disk driver reads starting address, and then reads one block of data and puts it in its own buffer
4. Disk driver sends interrupt signal to the CUP
5. CPU reads the datum into its registers (accumulator)
6. CPU examine if there is more to transfer, if answer is yes, the CPU signals the disk driver to do so meanwhile
7. CPU transfer the datum from registers to memory and increments its pointer to memory
8. DMA controller takes care of the last few steps (from signalling disk to transfer) .
chp 3 of assemly
LENGTH : Byte Length of a Label: This directive is not available in MASM. This is used to mention to the length of a data array or a string. MOV CX. LENGTH ARRAY This sta
init_lcd ;(this initialises a 2 row lcd) bcf TRISA,0 ;PORTA bit 0 as an output (lcd RS pin) bcf TRISA,1 ;PORTA bit 1
Internal Hardware-Interrupts Internal hardware-interrupts are the outcome of sure situations that occur during the execution of a program, for example. Divide by 0. The interru
Why is the capability to relocate processes desirable?
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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
You have to write a subroutine (assembly language code using NASM) for the following equation.
Register Organization of 8086 8086 has a great set of registers containing special purpose and general purpose registers. All the 8086 resisters are 16-bit registers.
Example : Write a program to move the contents of the memory location 0500H to BX and also to register CX. Add immediate byte 05H to the data residing in memory location, whose ad
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