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DMA Hardware (8237 DMAC) :
1)Processor contain HOLD/HOLD Acknowledge lines to interact with 8237
o DMAC can achieve control of ISA bus by asserting HOLD
o Processor acknowledges with HLDA
2)DRQ4 services slave controller Priorities are set as fixed
o DRQ0 highest and DRQ7 lowest
o It set at POST
o It can be reprogrammed for rotating priority
3)ISA address/data/control lines are also linked (not shown)
o It can access control registers through ports
o Each channel has a page register associated with
Program : Write an assembly program to find out the number of positive numbers and negative numbers from a given series of signed numbers. Solution : Take the i th num
Write an assembly language program to find the maximum of: y = x 6 - 14x 2 + 56x for the range -2 ≤ x ≤ 4, by stepping one by one through the range. The program should in
CAN U GIVE BRIEF THEORY
RET : Return from the Procedure:- At each CALL instruction, the register IP and register CS of the next instruction is pushed to stack, before the control is transferred to the
Write an account of your findings and produce a report containing all aspects of the above. Include a step-by-step 'simple User Guide' so that your program can be operated as inten
Write an 8086 program to find out the number of positive numbers and negative numbers from a given series of signed numbers include flow chart ..
#write a program 8086 to find the largest number
what is sahf nstrucions
ORG : Origin:- The ORG directive directs the assembler to begin the memory allotment for the specific segment, code or block from the declared address in the ORG statement. W
a pseudo-code to add username and password combination up to a limit of 10
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