Flags affected by cmp instruction in 8086
WebNov 1, 2024 · The 8085 instruction set has two types of Compare operations: Compare with accumulator (CMP) and Compare immediate with accumulator (CPI). The … WebUNIVERSITY OF NAMIBIA SCHOOL OF ENGINEERING AND THE BUILT ENVIRONMENT MICROPROCESSOR SYSTEMS TEST 1 : 2 HRS (iii) If the next instruction is ADD AX, 0005H, determine the content of register AX and show how the flags will be affected. [5 Marks] (iv) What is the physical address of the top of the stack. [2 Marks] Q4. (a) …
Flags affected by cmp instruction in 8086
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WebThe condition codes used by the Jcc, CMOVcc, and SETcc instructions are based on the results of a CMP instruction. Appendix B, ... (SRC2); ModifyStatusFlags; (* Modify status flags in the same manner as the SUB instruction*) Flags Affected ¶ The CF, OF, SF, ZF, AF, and PF flags are set according to the result. ... Virtual-8086 Mode Exceptions ... WebFlags Affected OF, SF, ZF, AR, PF, CF are undefined. Protected Mode Exceptions ... Virtual 8086 Mode Exceptions Same exceptions as in Real Address Mode; #PF(fault-code) for a page fault up: Chapter 17 -- 80386 Instruction Set prev: DEC Decrement by 1 next: ...
WebComputer Science questions and answers. 1. Question 1: a) Explain the difference between CMP and SUB instruction b) What is the last instruction in the procedure and what does it do? c) Select an instruction that adds BX to DX, and also adds the contents of the carry flag (C) to the result. d) If DL = 0F3H and BH = 72H , list the difference ... WebApr 20, 2024 · Six are status flags and three are control flags. The control flags can be set/reset by the programmer. 1. DF (Direction Flag) : controls the direction of operation …
Web- Flag –Control Instruction: The 8086 microprocessor has a set of flags that either monitors the state of executing instructions or controls options available in its operation. The instruction set includes a group of instructions that. when executed, directly affect the state of the flags. These instructions, shown in Fig. (a). WebMar 10, 2024 · The CMP instruction does internally a SUB and sets the flags accordingly. So all flags that are set by a SUB are also set by CMP. …
WebThis instruction executes as described above in compatibility mode and legacy mode. It is valid in 64-bit mode only if CPUID.80000001H:ECX.LAHF-SAHF[bit 0] = 1. ... Flags Affected ¶ None. The state of the flags in the EFLAGS register is not affected. ... Same exceptions as in protected mode. Virtual-8086 Mode Exceptions ¶ Same exceptions as ...
WebView Tutorial 2 2024 students.pdf from AA 1UNIVERSITY OF NAMIBIA – DEPT OF ELECTRICAL AND COMPUTER ENGINEERING MICROPROCESSOR SYSTEMS ASSIGNMENT 2024 QUESTION 1 [45 Marks] (a) If ES contains D321H, cincinnati bengals vestWebApr 11, 2024 · 14. Pins and Signals 8086 Microprocessor (Queue Status) The processor provides the status of queue in these lines. The queue status can be used by external device to track the internal status of the queue in 8086. The output on QS0 and QS1 can be interpreted as shown in the table. 14 Maximum mode signals. cincinnati bengals uniforms historyWebCMP subtracts the second operand from the first but, unlike the SUB instruction, does not store the result; only the flags are changed. CMP is typically used in conjunction with … cincinnati bengals visorWebOpcode Instruction Clocks Description F5 CMC 2 Complement carry flag Operation CF := NOT CF; Description CMC reverses the setting of the carry flag. No other flags are affected. Flags Affected CF as described above Protected Mode Exceptions None Real Address Mode Exceptions None Virtual 8086 Mode Exceptions None dh script fadedWebCMP instruction is like SUB (subtract), but the destination register will not be updated after exsecution. So the following code will perform the same result like CMP ebx, 10. CMP and SUB instruction affect to flags: Carry, Parity, Auxiliary, Zero, Sign and Overflow flags. cincinnati bengals uniforms 2022WebMar 25, 2024 · The CMP instruction is another example of conditionals. A CMP instruction performs a subtract operation on both operands, and the status flags ZF … cincinnati bengals vintage hoodieWebCMP Instruction. The CMP instruction compares two operands. It is generally used in conditional execution. This instruction basically subtracts one operand from the other for comparing whether the operands are equal or not. It does not disturb the destination or source operands. It is used along with the conditional jump instruction for ... cincinnati bengals upset