A look at the snow Forum strongman to write a simple virtual machine, can simulate dos6.22.

easyVM_Small_
.............\easyVM_Small
.............\............\easyVM_Small
.............\............\............\exe
.............\............\............\...\Bios
.............\............\............\...\....\BIOS.bin
.............\............\............\...\....\BiosData.bin
.............\............\............\...\DOS.IMG
.............\............\............\...\easyVM.exe
.............\............\............\...\easyVM.ini
.............\............\............\...\Readme.txt
.............\............\............\...\TC.IMG
.............\............\............\Src
.............\............\............\...\Bios
.............\............\............\...\....\easyBIOS.Asm
.............\............\............\...\cpu
.............\............\............\...\...\cpu.cpp
.............\............\............\...\...\cpu.h
.............\............\............\...\...\Instruction.cpp
.............\............\............\...\...\Instruction.h
.............\............\............\...\easyVM.cpp
.............\............\............\...\easyVM.h
.............\............\............\...\easyVM.ini
.............\............\............\...\IO
.............\............\............\...\..\Display.cpp
.............\............\............\...\..\Display.h
.............\............\............\...\..\DMA.cpp
.............\............\............\...\..\DMA.h
.............\............\............\...\..\Floppy.cpp
.............\............\............\...\..\Floppy.h
.............\............\............\...\..\HardDisk.cpp
.............\............\............\...\..\HardDisk.h
.............\............\............\...\..\KeyBoard.cpp
.............\............\............\...\..\KeyBoard.h
.............\............\............\...\..\PIC.cpp
.............\............\............\...\..\PIC.h
.............\............\............\...\..\Printer.cpp
.............\............\............\...\..\Printer.h
.............\............\............\...\..\RTC.cpp
.............\............\............\...\..\RTC.h
.............\............\............\...\..\Serial.cpp
.............\............\............\...\..\Serial.h
.............\............\............\...\..\SystemTimer.cpp
.............\............\............\...\..\SystemTimer.h
.............\............\............\...\StdAfx.cpp
.............\............\............\...\StdAfx.h

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