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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
do you type assembly code or machine code instructions like b8 0100000 to add to register EAX straigt onto dos command line or do you have to same in a file and what extension woul
Open notepad and enter the code for a program that calculates the following arithmetic expression: x = a + b + c - d - e + f The operands a, b, c, d, e, f, and x should be declared
Write Policy A write policy determines how the cache deals with a write cycle. The 2 common write policies areWrite-Throughand Write-Back. In Write-Back policy, the cache behav
CMPS : Compare String Byte or String Word:-The CMPS instruction may be utilized to compare two strings of Words or byte. The length of the string ought to be stored in the CX. If
RCR: Rotate Right through Carry:- This instruction rotates the contents bit-wise of the destination operand right by the specified count through carry flag (CF). For each operati
For an 8088 the 2 addresses linked with an 8259A are normally consecutive, and the AO line is associated to the AO pin, but because there are just 8 data pins on the 8259A and the
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
this is my first project i dont know where to start
program to arrange a given set of numbers in descending order
00h-1h
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