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其它操作系统综合讨论区 » [Help] SOS Who knows the difference between pure DOS and Windows emulated DOS?
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Floor1 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Who knows the difference between pure DOS and Windows emulated DOS?
Floor2 如是大师 Posted 2003-04-30 00:00
元老会员 Posts 3,351 Credits 9,654 From 湖北
Do you mean DOS emulated by winnt?
Floor3 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Yes.
Floor4 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Is there any expert who knows? Hurry up and tell the little brother
Floor5 红色狂想 Posted 2003-04-30 00:00
金牌会员 Posts 1,501 Credits 4,289 From 河南省
The DOS in NT and 2000 is just a shell, not the real DOS system.
Floor6 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Oh, be more specific! It's too general! Because I'm still a beginner!!
Floor7 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Elders, why don't you take care of the younger brother?
Floor8 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
What's the difference in the simulation methods? Is there any brother who knows?
Floor9 如是大师 Posted 2003-04-30 00:00
元老会员 Posts 3,351 Credits 9,654 From 湖北
It's not correct to say it's a DOS shell either
Floor10 Wengier Posted 2003-04-30 00:00
系统支持 Posts 10,521 Credits 27,736
Pure DOS means booting the computer with DOS, such as pure MS-DOS 1.0, 2.0, up to 8.0, pure PC-DOS, pure ROM-DOS, etc. And emulated DOS means first entering another non-DOS operating system, and then it provides functions similar to the DOS interface and operation, that is, virtual DOS.
Floor11 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Then how should I put it? And what exactly is different about its simulation method?
Floor12 bgn Posted 2003-04-30 00:00
中级用户 Posts 78 Credits 349
Microprocessors above 386 have three working modes, namely real mode, protected mode, and virtual 86 mode.

DOS 622 works in real mode (8086).

Windows works in protected mode. To be compatible with 8086 in protected mode, Intel also provides the virtual 86 mode so that under the Windows platform, both 32-bit programs and MSDOS programs can be run.

MSDOS programs in protected mode run in virtual 86 mode, but the memory addressing method is the same as that of 8086, which is also 1MB.
Floor13 Wengier Posted 2003-04-30 00:00
系统支持 Posts 10,521 Credits 27,736
For a simulated DOS, it depends on the simulation ability of this system. Some are simulated well, some are simulated poorly. Just like current game simulators, which simulate the original game consoles to play games, but the simulation effects are different from each other.
Floor14 木头 Posted 2003-04-30 00:00
初级用户 Posts 8 Credits 119
Oh, are there any other things?
Floor15 红色狂想 Posted 2003-04-30 00:00
金牌会员 Posts 1,501 Credits 4,289 From 河南省
The following is a quote from bgn on 2003-4-30 9:20:54:
Processors above 386 have three working modes, namely real mode, protected mode, and virtual 86 mode.
DOS 622 works in real mode (8086)
Windows works in protected mode. To be compatible with 8086 in protected mode, Intel provides the virtual 86 mode
so that under the Windows platform, both 32-bit programs and MS-DOS programs can be run.
MS-DOS programs in protected mode run in virtual 86 mode, but the memory addressing method is the same as that of 8086,
which is also 1M.


What bgn said is not already very detailed?
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