2024 Push word ptr 20 bx+si-2

Push word ptr 20 bx+si-2

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August undefined, 2024

Web我知道例如 push eax会将eax保存到堆栈中，并将esp减4。. pushdword ptr表示它需要压入4个字节，但是我感到困惑。. 同样如果是 [esi + 22]，这会是同一回事吗？. 相关讨论. 很 …

flat assembler - How to do word ptr [200h] in Fasm?

WebMOV WORD PTR [BP]，20H。. 其中的： BYTE PTR 或 WORD PTR，就是说明： 8 位数或 16 位数的。. BYTE PTR这样的叫属性修饰符，具体来说，就是操作数为字节；相应 … Web16-bit registers for used indirect addressing: SI, DI, BX, and BP; 32-bit registers for used indirect addressing: any of the general purpose 32-bit registers may be used (for .386 or … hubert burda malaysia

Instruction set and assembler directives of 8086 Microprocessor

http://eng.staff.alexu.edu.eg/~mbanna/Microprocessors_CC421_SSP/Assignments_Binder.pdf Webmov ax, WORD PTR [bx] where WORD specifies the data size PTR re-casts memory location pointed by [BX] into the WORD-sized value. When you specify more than one register, the processor adds the contents of the two addresses together to determine the effective address (the address of the data to operate on): mov ax, [bx+si] 2. WebNov 6, 2024 · 常用汇编指令 word ptr 与 byte ptr word ptr指明了指令访问的内存单元是一个字单元。byte ptr指明了指令访问的内存单元是一个字节单元。dword ptr指令访问的内存单 … hubert campaert

pointers - Assembly Word ptr meaning - Stack Overflow

Addressing Modes of 8086 Microprocessor - with Examples

http://www.c-jump.com/CIS77/ASM/Instructions/I77_0250_ptr_pointer.htm WebAug 9, 2015 · 3. List the 16-bit registers that are used for register addressing. 4. List the 32-bit registers that are used for register addressing in the 80386 through the Core2 … hubert burda media holding kgWebAnswer (1 of 2): I’m reading the question as whether the keyword PTR is needed… In other words, why do this: [code] CMP WORD PTR [SI], 2 [/code]when this might be sufficient: … hubert burda krankheit

"WebMASM uses the standard Intel syntax for writing x86 assembly code. The full x86 instruction set is large and complex (Intel's x86 instruction set manuals comprise over 2900 pages), and we do not cover it all in this guide. For example, there is a 16-bit subset of the x86 instruction set. Using the 16-bit programming model can be quite complex. " - Push word ptr 20 bx+si-2

Push word ptr 20 bx+si-2

Introduction to Assembly Language Programming - WordPress.com

WebJul 16, 2024 · 指出下列传送指令中，哪些是非法指令： (1) mov ds,0100h (2) mov bp,al (3) mov bx,al (4) xchg ah,al (5) out 21h,al (6) out 310,al (7) mov [bp+di],ax (8) mov … Web下列指令中，有语法错误的是 ( ) a．mov[st]，[di]b．in al，dxc．jmp word ptr[bx+8]d．push word ptr 20[bx+si-2] 答案 A[解析] MOV指令是最基本的数据传送指令，它可以在寄存器与 …

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WebFeb 23, 2024 · The way of specifying data to be operated by an instruction is known as addressing modes. This specifies that the given data is an immediate data or an address. … WebJul 2, 2024 · 下列指令中,有语法错误的是: a. mov [si],[di] b. in al,dx c. jmp word ptr[bx] d. push word ptr 20[bx+si-2] 答案：a autonum . 假定(ss)=2000h,(sp)=0100h,(ax)=2107h,执行指 …

Web• PUSH DS • PUSH [5000H] Fig. 2.2 Push Data to stack memory POP : Pop from Sack ... CMP BX, [SI] CMP BX, CX MUL : ... MUL WORD PTR [SI] ; (DX)(AX) (AX) x ([SI]) IMUL :Signed Multiplication This instruction multiplies a signed byte in source operand by a signed byte in AL or a signed word in source operand by a signed word in AX. Eg. http://www1.coe.neu.edu/~perry/mim3122/AL_basics.ppt

Web1．popcs2．pushwordptr20[bx+si-2]3．leabx，4[bx]4．jmpbyteptr[bx]5．sarax，56．movbyteptr[bx],10007．cmp[di]，[si]8．addbx，offseta9．inal,dx10．mul25... WebOct 4, 2012 · memory so that the PUSH and POP instructions and other stack operations will be understood. 2. ... •16-bit register names: AX, BX, CX, DX, SP, BP, SI, and DI. 9 •In 80386 & above, extended 32-bit register names ... assembler directive BYTE PTR, WORD PTR, DWORD PTR, or QWORD PTR.

WebIf BX, SI, or DI appears in the instruction operand field, segment register DS ... WORD PTR MOV WORD PTR [SI], 12H ... PUSH Source — Push data (word) onto stack — It does not …

WebPUSH BP MOV BP,SP IF: CMP WORD PTR[BP+4],1 JG ENDIF THEN: MOV AX,1 JMP RETURN ENDIF: MOV CX,[BP + 4] DEC CX PUSH CX CALL FACT MUL WORD PTR[BP+4] RETURN: … hubert burda media hamburgWebDec 31, 2024 · This addressing mode is similar to the base plus index addressing mode, but here to generate the physical address of the memory 8-bit or 16-bit displacement is added … hubert burda media cfoWebMOV AX, BX MOV AX, 5000H MOV AX, [SI] MOV AX, [2000H] MOV AX, 50H[BX] MOV [734AH], BX . MOV DS, CX MOV CL, [357AH] Direct loading of the segment registers with immediate data is not permitted. PUSH: Push to Stack . This instruction pushes the contents of the specified register/memory location on to the stack. hubert burda media holdingWebe.g. [ BX + SI + constant ] • During execution, the processor uses a temporary register to calculate sum of valuescalculate sum of values – It then accesses memory addressed by … hubert burkhardtWebinc bx ; Increment index loop L1 Indirect Addressing • Can you figure out what this will do? – Recall B800:0000 is where text video memory begins mov ax, 0B800h mov ds, ax mov cx, … hubert burda media pressehttp://www.math.uaa.alaska.edu/~afkjm/cs221/handouts/irvine4-5.pdf hubert bushWebmov ax,[bx+si+4] mov ax,[bx][si]+4 mov ax,[bx][si+4] All these instructions will use the same address. If BX=4 and SI=8, then the address will be 4+8+4 =16 (decimal) = 10h. Base … hubert catanese