Emu8086 Overview Emu8086 combines an advanced source editor, assembler, disassembler, software emulator (Virtual PC) with debugger, and step by step tutorials This program is extremely helpful for those who just begin to study assembly language It compiles the source code and executes it on emulator step by step
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[PDF] 8086 assembler tutorial for beginners (part 1) what is assembly
here is a short program that demonstrates the use of MOV instruction: ORG 100h ; this directive required for a simple 1 segment com program MOV AX,
[PDF] Running The Emulator (emu8086)
emu8086 is an emulator of Intel 8086 (AMD compatible) microprocessor with integrated 8086 assembler and tutorials for beginners emulator runs programs like
[PDF] Help for Emu8086
Emu8086 Overview Emu8086 combines an advanced source editor, assembler, disassembler, software emulator (Virtual PC) with debugger, and step by step tutorials This program is extremely helpful for those who just begin to study assembly language It compiles the source code and executes it on emulator step by step
[PDF] COM353 Microprocessors Laboratory - Arzum Karatas
Run opt-in programs in EMU8086 Lab Outcomes : Practice 8086 Emulator • Executing code examples • Using multi base calculator and base convertor
[PDF] Microprocessors Lab Manual
Developing Assembly Language Programs and Executing using Emu8086 and For our lab you have to put all 8086 assembler commands inside this folder
[PDF] UNIT-2 8086 ASSEMBLY LANGUAGE PROGRAMMING
The 8086 instructions are categorized into the following main types (i) Data copy Fig : program for moving a string from one location to another in memory
[PDF] what is assembly language?
you can copy paste the above program to emu8086 code editor, and press [ Compile and Emulate] button (or press F5 key on your keyboard) the emulator
[PDF] 8088/8086 Microprocessor Programming
– Digits 0 to 9 are represented by ASCII codes 30 – 39 • Example Write an 8086 program that displays the packed BCD number in register AL on the system video
[PDF] Lab Session 01 - WordPresscom
Introduction to Assembly Language Tools and Familiarization with Emu8086 An assembler is a program that converts source-code programs written in
[PDF] Programs for 16 bit arithmetic operations for 8086 - NARSIMHA
AIM: - To write an assembly language program for Addition of two 16-bit numbers APPARATUS: 1 8086 microprocessor kit/MASM ----1 2 RPS (+5V) --
[PDF] emu8086 tutorial
[PDF] emu8086 tutorial beginners pdf
[PDF] emu8086 tutorial pdf
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Help for Emu8086
| Help Index | Overview | Tutorials | Emu8086 reference |Documentation for Emu8086
lWhere to start?
lTutorials
lEmu8086 reference
lComplete 8086 instruction set
file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/index.html01/05/2006 12:15:54Overview of Emu8086
Emu8086 Overview
Everything for learning assembly language in one pack! Emu8086 combines an advanced source editor, assembler, disassembler, software emulator (Vir tual PC) with debugger, and step by step tutorials. This program is extremely helpful for those who just begin to study asse mbly language. It compiles the source code and executes it on emulator step b y step. Visual interface is very easy to work with. You can watch registers, fla gs and memory while your program executes. Arithmetic & Logical Unit (ALU) shows the internal work of the central processor unit (CPU). Emulator runs programs on a Virtual PC, this completely blocks your prog ram from accessing real hardware, such as hard-drives and memory, since your assembly code runs on a virtual machine, this makes debugging much easie r.8086 machine code is fully compatible with all next generations of Intel
's micro- processors, including Pentium II and Pentium 4, I'm sure Pentium 5 will support8086 as well. This makes 8086 code very portable, since it runs both on
ancient and on the modern computer systems. Another advantage of 8086 instructio n set is that it is much smaller, and thus easier to learn.Emu8086
has a much easier syntax than any of the major assemblers, but will sti ll generate a program that can be executed on any computer that runs 8086 m achine code; a great combination for beginners!Note: If you don't use
Emu8086
to compile the code, you won't be able to step through your actual source code while running it.Where to start?
1. StartEmu8086
by selecting its icon from the start menu, or by runningEmu8086.exe
2.Select "
Samples
" from " File " menu. 3. Click [Compile and Emulate] button (or press F5 hot key). 4.Click [
Single Step
] button (or press F8 hot key), and watch how the code file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/start_unframed.html (1 of 2)01/05/2006 12:16:04 Õ
Overview of Emu8086
is being executed. 5. Try opening other samples, all samples are heavily commented, so it's a great learning tool. 6.This is the right time to
see the tutorials file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/start_unframed.html (2 of 2)01/05/2006 12:16:04 Õ
Tutorials
Tutorials
8086 Assembler Tutorials
lNumbering Systems
lPart 1: What is an assembly language?
lPart 2: Memory Access
lPart 3: Variables
lPart 4: Interrupts
lPart 5: Library of common functions - emu8086.inc
lPart 6: Arithmetic and Logic Instructions
lPart 7: Program Flow Control
lPart 8: Procedures
lPart 9: The Stack
lPart 10: Macros
lPart 11: Making your own Operating System
l Part 12: Controlling External Devices (Robot, Stepper-Motor...)
file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/tutorials.html01/05/2006 12:16:08 Õ
Reference for Emu8086
Emu8086
reference lSource Code Editor
lCompiling Assembly Code
lUsing the Emulator
lComplete 8086 instruction set
lList of supported interrupts
lGlobal Memory Table
lCustom Memory Map
lMASM / TASM compatibility
lI/O ports
file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/reference.html01/05/2006 12:16:14 Õ
8086 instructions
Complete 8086 instruction set
Quick reference:
AAA AAD AAM AAS ADC ADD AND CALL CBW CLC CLD CLI CMC CMP CMPSB CMPSW CWD DAA DAS DEC DIV HLT IDIV IMUL IN INC INT INTO IRET JA JAE JB JBE JC JCXZ JE JG JGE JL JLE JMP JNA JNAE JNB JNBE JNC JNE JNG JNGE JNL JNLE JNO JNP JNS JNZ JO JP JPE JPO JS JZ LAHF LDS LEA LES LODSB LODSW LOOP LOOPELOOPNE
LOOPNZ
LOOPZ MOV MOVSB MOVSW MUL NEG NOP NOT OR OUT POP POPA POPF PUSH PUSHA PUSHF RCL RCR REP REPE REPNE REPNZ REPZ RET RETF ROL ROR SAHF SAL SAR SBB SCASB SCASW SHL SHR STC STD STI STOSB STOSW SUB TEST XCHG XLATB XOROperand types:
REG : AX, BX, CX, DX, AH, AL, BL, BH, CH, CL, DH, DL, DI, SI, BP, SP. SREG : DS, ES, SS, and only as second operand: CS. memory : [BX], [BX+SI+7], variable, etc...(seeMemory Access
immediate : 5, -24, 3Fh, 10001101b, etc...Notes:
l When two operands are required for an instruction they are separated by comma. For example:REG, memory
file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/8086_instruction_set.html (1 of 73)01/05/2006 12:16:29 Õ8086 instructions
l When there are two operands, both operands must have the same size (except shift and rotate instructions). For example:AL, DL
DX, AX
m1 DB ?AL, m1
m2 DW ?AX, m2
l Some instructions allow several operand combinations. For example: memory, immediateREG, immediate
memory, REGREG, SREG
l Some examples contain macros, so it is advisable to use Shift + F8 hot key toStep Over
(to make macro code execute at maximum speed set step delay to zero), otherwise emulator will step through each instruction of a macro. Here is an example that uses PRINTN macro: #make_COM# include 'emu8086.inc'ORG 100h
MOV AL, 1
MOV BL, 2
PRINTN 'Hello World!' ; macro.
MOV CL, 3
PRINTN 'Welcome!' ; macro.
RET These marks are used to show the state of the flags: 1 - instruction sets this flag to 1 0 - instruction sets this flag to 0 r - flag value depends on result of the instruction. - flag value is undefined (maybe 1 or 0 file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/8086_instruction_set.html (2 of 73)01/05/2006 12:16:29 Õ8086 instructions
Some instructions generate exactly the same machine code, so disassembler may have a problem decoding to your original code. This is especially important for Conditional Jump instructions (seeProgram Flow Control
" in Tutorials for more information).Instructions in alphabetical order:
InstructionOperandsDescription
AAA No operandsASCII Adjust after Addition.Corrects result in AH and AL after addition when working with BCD values.
It works according to the following Algorithm:
if low nibble of AL > 9 or AF = 1 then: lAL = AL + 6
lAH = AH + 1
lAF = 1
lCF = 1
else lAF = 0
lCF = 0
in both cases: clear the high nibble of AL.Example:
MOV AX, 15 ; AH = 00, AL = 0Fh
AAA ; AH = 01, AL = 05
RET file:///D|/Heep/Assem/SW/Emu8086v3.07/Help/8086_instruction_set.html (3 of 73)01/05/2006 12:16:29 Õ8086 instructions
CZSOPA
r????rAAD No operandsASCII Adjust before Division.
Prepares two BCD values for division.
Algorithm:
lAL = (AH * 10) + AL
lAH = 0
Example:
MOV AX, 0105h ; AH = 01, AL = 05
AAD ; AH = 00, AL = 0Fh (15)
RETCZSOPA
?rr?r?AAM No operandsASCII Adjust after Multiplication.Corrects the result of multiplication of two BCD values.