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Index > DOS > A gift: Some Protect Mode Demo Programs for Dos

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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
In the last two weeks, I have studied the Protect Mode. So writing three program for practicing it. I think that it maybe help you for study.
The overview of programs is belowing:
1.T10-3.ASM :None Privilege Switching in the TASK on Protect Mode
2.T10-4.ASM :Demo Control Between Different Privilege Levels By
Through Callgate
3.T10-5.ASM :Demo Task Switching and different Privilege Level Swiching
It must be exetute on the pure DOS enviroment. And it waste for me two weeks . The system hang up more times when debug it.
In the future, I will writing some programs for interrupt and exception, Page Protect and virutal 8086 Mode, and PAE mode.
The programs are writed by pure fasm , Thanks Priviav.
Post 25 Aug 2003, 04:58
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pelaillo
Missing in inaction


Joined: 19 Jun 2003
Posts: 878
Location: Colombia
pelaillo
Thanks Kevin_Zheng, I'll give a look. Wink
Post 25 Aug 2003, 06:48
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
The attached files are some demo program on the Protect Mode. I have added some new demo program and maybe help you for studing Protect Mode.
The files list is belowing:
Code:
;FileName       :T10-3.ASM
;Function       :None Privilege Switching in the TASK on Protect Mode
;FileName   :T10-4.ASM
;Function     :Demo call gates facilitate controlled transfers of program 
;           :control between different privilege levels.
;FileName   :T10-5.ASM
;Function     :Demo Task Switching and different Privilege Level Swiching 
;           :in the Task.
;FileName       :T10-6.ASM
;Function       :Demo Interrupt & Trap Handles on Protect Mode 
;FileName       :T10-7.ASM
;Function       :Simulation Interrupt & Trap Handles on Protect Mode 
    
[/code]


Last edited by Kevin_Zheng on 15 Sep 2003, 10:40; edited 1 time in total
Post 09 Sep 2003, 09:23
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
I have added two progarams on the package. It is belowing:
:FileName :T10-8.ASM
:Function :Demo Privileged Instructions
:FileName :T10-9.ASM
:Function :Demo I/O Protection and I/O Sensitivity Instructions
In the future, I will adding some demo programs for page protection, V86 and PAE&PSE36 mode.
I think that it maybe helpping you.
And others, I hope that fasm supported belowing function:

Code:
;The Trap Gates from 0 to 0CH 
repeat      12-0+1
      DW      ErrBegin        
    DW      ErrCode_Sel
 DB      0
   DB      AT386TGAT
   DW      0
end        repeat

;The Trap Gate 0DH (#GP--General Protection Fault)
Int0D       Gate    0,GPTSS_Sel,0,ATTASKGAT,0
    

Because struct define doesn't support anonymous define, so I must use DB syntax on the repeat instruction. I understand why doesn't support it, because the struct define used the macro syntax, so the complier will not juge the anonymous struct and macro. So I recommend using "<>" on the struct define. It will solution the above question. It's used on masm/TASM for same as purpose.


Last edited by Kevin_Zheng on 28 Sep 2003, 15:03; edited 1 time in total
Post 15 Sep 2003, 09:49
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Tommy



Joined: 17 Jun 2003
Posts: 489
Location: Norway
Tommy
This is great! Thanks a lot!!! Cool

Keep up the good work! Wink
Post 16 Sep 2003, 18:10
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
I have added one progaram on the package. It is belowing:
:FileName :T10-10.ASM
:Function :Demo 4K Bytes Pages Manager on Protect Mode

In the future, I will adding some demo programs for 4M&2M page protection, V86 and PAE&PSE36 mode.
I think that it maybe helpping you.


Last edited by Kevin_Zheng on 16 Oct 2003, 15:20; edited 1 time in total
Post 28 Sep 2003, 15:02
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
Sorry, I found a bug on the t10-11.asm and I have fixed it. The newest t10-11.exe extended stronly robust on V86 mode. I have test almost of DOS program erunning OK on V86 mode.
Please used the newest package.
I have added one progaram on the package. It is belowing:
Code:
FileName      :T10-11.ASM
Function       :Demo Interrupt and Exception Handling in Virtual-8086 Mode
Notice          :
   On the first the T10-11.exe must execute on the pure   DOS eviroment.The maching state will changing V86 Mode, then executing [color=red]intff.com[/color] for return real mode.
    

In the future, I will adding some demo programs for 4M&2M page protection, VME and PAE&PSE36 mode.
I think that it maybe helpping you.


Last edited by Kevin_Zheng on 19 Oct 2003, 16:11; edited 1 time in total
Post 16 Oct 2003, 15:18
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
I have added one progaram on the package. It is belowing:
Code:

FileName :T10-12.ASM
Function :Demo Interrupt and Exception Handling in VME V86 Mode
Notice :
On the first the T10-12.exe must execute on the pure DOS eviroment.The maching state will changing V86 Mode, then executing intff.com for return real mode.



In the future, I will adding some demo programs for 4M&2M page protection and PAE&PSE36 mode.
I think that it maybe helpping you.


Last edited by Kevin_Zheng on 23 Oct 2003, 10:39; edited 1 time in total
Post 19 Oct 2003, 16:10
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Dear All:
The newest package supported more compatibilty for old PC about protect mode. Please using it.


Description:
Download
Filename: protect.zip
Filesize: 82.29 KB
Downloaded: 392 Time(s)

Post 23 Oct 2003, 10:36
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Vortex



Joined: 17 Jun 2003
Posts: 318
Vortex
Thanks Kevin_Zheng for the examples.Image

_________________
Code it... That's all...
Post 25 Oct 2003, 09:04
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