BillW50 wrote:
> "Vic RR Garcia" <(E-Mail Removed)> wrote in message
> news:4f88dfec$0$11663$(E-Mail Removed)...
>> On 04/13/12 20:22, XP Guy wrote:
>>> Yousuf Khan wrote:
>>>
>>>>> That's about as crazy an idea as the OP running Win-98 DOS in
>>>>> that tablet PC.
>>>>> If you can get it working, it'll be 2 or more hours just to boot.
>>>> Well, it is a PC Tablet he's talking about here, not just some old
>>>> ARM tablet. The processors could be quite powerful in this one if
>>>> you wanted it to be. Plus there's virtualization support built
>>>> into most x86 processors these days.
>>> My point was to run XP natively - not under some crazy-ass Win-8
>>> virtualization.
>>>
>>> And anything can run DOS - so long as it has a conventional PC BIOS -
>>> which I have no idea if any current win-8 tablet has, and probably
>>> neither does anyone here...
>> And that's the crux, no tablet has PC BIOS, or keyboard or Floppy, or
>> IDE disk.
>> Win98-DOS require those 3 devices to boot.
>
> Actually if your machine supports booting from USB (which they basically
> all do since 2003 or so) then DOS can boot from a flash, external hard
> drive, etc. For example, I moved my Windows 98SE Startup disk to a flash
> drive. And it runs well.
>
As I understand it, the reason it works, is DOS uses extended INT 0x13
calls, even when it's running. And by doing it that way, DOS is one
of the fortunate ones.
http://en.wikipedia.org/wiki/Int_13h
Other OSes use their own drivers, and pick the worst time to switch
over to using those drivers.
Paul