Virtual DOS machine
Virtual DOS machine (VDM) is a technology that allows running 16-bit/32-bit DOS and 16-bit Windows programs on Intel 80386 or higher computers when there is already another operating system running and controlling the hardware.
Overview
Virtual DOS machines normally rely on the virtual 8086 mode of the Intel 80386 processor, which allows real mode 8086 software to run in a controlled environment by catching all operations which involve accessing protected hardware and forwarding them to the normal operating system (as exceptions). The operating system can then perform an emulation and resume the execution of the DOS software.
VDMs generally also implement support for running 16- and 32-bit protected mode software (DOS extenders), which has to conform to the DOS Protected Mode Interface (DPMI).
When a DOS program running inside a VDM needs to access a peripheral, Windows will either allow this directly (rarely), or will present the DOS program with a virtual device driver (VDD) which emulates the hardware using operating system functions. A VDM will systematically have emulations for the Intel 8259A interrupt controllers, the 8254 timer chips, the 8237 DMA controller, etc.
Podcasts:
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by Sheavy
Virtual Machine
by: SheavyYou like to see me, I'm everywhere
You say you need me but you always disappear
The slate is empty, you wiped it clean
They say you live just like a Virtual Machine
I want you to feel like I do
I want you to feel.....like I do
The years have left you, A faceless dream
that hides the pain and all the sorrow that you've seen
The faintest laughter, The brightest skies
I wish you everything this life just can't provide
I want you to feel like I do
I want you to feel.....like I do
The wait is over, I feel it's near
When all the empty skies will fade and disappear
It's all the same now, It's just a dream
No more to walk this world My Virtual Machine
I want you to feel like I do
I want you to feel.....like I do