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ADC: Add with Carry:-This instruction performs the similar operation a like ADD instruction, but adds the carry flag bit (which might be set as a result of the previous calculations) to the result. All of the condition code flags are affected by this instruction. The instance of this instruction along with the modes is as follows:
Example :
1. ADD 0100H Immediate (AX implicit)
2. ADD AX, BX Register
3. ADD AX, [SI] Register indirect
4. ADD AX, [5000H] Direct
5. ADD [5000H] 0100H Immediate
INTO : Interrupt on Overflow:- It is executed, when the overflow flag OF is set. The new contents of IP and CS register are taken from the address 0000:0000 as described in INT
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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 P
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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
what is the hex value in ax after executing the instructions ax= 1E8A bx=4080 add al,bl sub ah,bh
Write a program to mask bits D3D2D1D0 and to set bits D5D4 and to invert bits D7D6 of ax register
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The modes are determined by the contents of the control register, whose format is given in Figure These modes are: Mode 0: If a group is in mode 0, it is divided into 2 sets.
Mov ax, [1234h: 4336h + 100]
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