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中国DOS联盟论坛 » GRUB4DOS、SYSLINUX及其它启动管理软件讨论专区 » GRUB4DOS mailing lists and resource links

StickyI View 47,766　Replies 29

Floor 16 Posted 2007-07-12 15:20　·　中国河南南阳联通

不点

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The problem is here:
get_cdinfo(7f),int13/4B01(7F),err=0,drive=7f, cdrom_drive==9F.

Using DL=7F to call, the successfully returned 9F is actually a useless value.

Just now, I have uploaded the test grldr and grub.exe to http://grub4dos.jot.com/, please download and test.

If it still fails, then still use Insert single-step debugging, just post the above get_cdinfo line, the purpose is to see the CDROM drive number.

Whether it succeeds or not, with debug on, post the display of geometry (cd) and root (cd).

因为我们亲手创建，这个世界更加美丽。

Floor 17 Posted 2007-07-12 18:49　·　中国福建泉州石狮市电信

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```
get_cdinfo(7f),int13/4B01(7F),err=0,drive=7f, int13/4B01(9F),err=0,drive=9F
cdrom_drive==9F.



>debug on

>root (cd)

int13/41(9F),version=0,int13/4B01(9F),err=1,drive=9F,int13/48(9f),err=1,c/H/S=0/0/0,sector count/size=0/0,

int13/08(9f),version=1,C/H/S=16383/255/63,

ERROR 26:Selected disk does not exist

>geometry (cd)

int13/41(9f),version=0, int13/4B01(9f),err=1,drive=9F, int13/48(9F),err=1,c/H/S=0/0/0,sector count/size=0/0,

int13/08(9f),version=1,C/H/S=65536/255/15,

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Floor 18 Posted 2007-07-12 20:49　·　中国河南南阳联通

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This is very strange. When booting, executing get cdinfo succeeded, and the returned 9F was the CD.

But when executing get cdinfo the second time, it failed. Could it be that after executing 4B01 once, the CD is unloaded? If so, that's too bad!

Uploaded a new version again (still at http://grub4dos.jot.com/). This time----during booting----executed several more get cdinfo to see if it would fail. Guessed it should fail.

Still using the Insert key for step-by-step debugging. This time just pay attention to posting the situation of get cdinfo.

因为我们亲手创建，这个世界更加美丽。

Floor 19 Posted 2007-07-12 22:05　·　中国福建泉州石狮市电信

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```
get_cdinfo(7F),int13/4B01(7F),err=0,drive=7f,
int13/4B01(9F),err=0,drive=9F,int13/4B01(9f),err=0,drive=9F.
(Repeated 14 times,...),cdrom_drive==9F

No more display this time.
biosdisk_int13_extensions read=0,drive=0x9f,dap=580,err=0x1
```

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Floor 20 Posted 2007-07-12 22:07　·　中国山东菏泽联通

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Hope the problem can be solved...

Floor 21 Posted 2007-07-13 07:44　·　中国河南南阳联通

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Try starting again by pressing c instead of Insert to enter the command line. The meaning of this c is that the built-in preset_menu is not executed either. Let's see under such a situation,

debug on

cat --hex (cd)16+4

and

geometry (cd)

root (cd)

Are there any different results?

Note: Run geometry (cd) multiple times continuously and see if its results change.

=====================

wang6610: This problem can definitely be solved. I am also researching the code in ioslinux right now. This is really a very good code, and there are many methods for dealing with different BIOS bugs in it. No wonder it can be ranked among the top 100 on freshmeat. Our grub4dos is currently ranked among the top 2000 on freshmeat. GNU GRUB is ranked among the top 200.

[ Last edited by 不点 on 2007-7-13 at 10:50 AM ]

因为我们亲手创建，这个世界更加美丽。

Floor 22 Posted 2007-07-13 11:57　·　中国福建泉州石狮市电信

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I use GRLDR as the bootloader.
Directly press the C key to enter the command line.
The following each segment is the data obtained after restarting. Because after executing once.
The subsequent data is the same as the previous one (the last post).



>debug on

>cat --hex (cd)16+4

int13/41(9F), version=0, int13/4B01(9F), err=0, drive=9F,

biosdisk_int13_extensions read=0, drive=0x9f, dap=580, err=0x1

Error 30: disk read error



>debug on

>root (cd)

The same as above..



>debug on

>geometry (cd)

int13/41(9f), version=0, int13/4B01(9f), err=0, drive=9F, drive 0x9f(lba): C/H/S=65536/255/15

Sector Count/Size=250675200/2048

int13/41(9f), version=0, int13/4B01(9f), err=1, drive=9F, int13/48(9F), err=1, c/H/S=0/0/0, sector count/size=0/0,

int13/08(9f), version=1, C/H/S=0/0/0

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Floor 23 Posted 2007-07-13 18:27　·　中国河南南阳联通

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Just uploaded two versions to http://grub4dos.jot.com/

Note that there are two versions: there are two grldr uploaded today, and two grub.exe as well.

Please give it a try.

This time, still press c to enter the command line first. However, after executing debug on this time, you don't need to execute other commands, just execute

geometry (cd)

Execute this command repeatedly, see if the displayed information changes, and if there are changes, see if there are any patterns in these changes.

Note that for the two uploaded versions, test each version.

因为我们亲手创建，这个世界更加美丽。

Floor 24 Posted 2007-07-13 18:58　·　中国福建福州仓山区电信

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Originally posted by chenall at 2007-7-13 11:57 AM:
I use GRLDR as the bootloader.
Directly press the C key to enter the command line.
Each of the following segments is the data obtained after restarting. Because after executing once.
The subsequent data is the same as the previous one (the last post).
>debug on

 ... 



What version are the newly uploaded two files? Are they also 0.43?

Floor 25 Posted 2007-07-13 20:36　·　中国河南南阳联通

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It's for testing/debugging bugs. You don't need to care.

The version released by bean from July to October is still the one for everyone at present.

因为我们亲手创建，这个世界更加美丽。

Floor 26 Posted 2007-07-13 20:40　·　中国福建泉州石狮市电信

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In order to facilitate testing, download both files completely. One is named GRUB40.EXE and the other is GRUB41.EXE. After booting through the ISO - LINUX of the CD - ROM, then load these two files respectively for testing.

GRUB.EXE VER 40
>debug on
>geometry (cd)
int13/41(9F),version=0, int13/4B01(9F),err=0,drive=9F,drive 0x9f(LBA):C/H/S
=65536/255/15,Sector Count/Size=250675200/2048

>geometry (cd)
int13/41(9F0,verion=0, int13/4B01(9F0,err=1,drive=9F, int13/48(9F),err=1,C
/H/S=0/0/0,Sector Count/Size=0/0, int13/08(9F),version=1,C/H/S=65536/255/15,

Error 26: Selected disk does not exist
>geometry (cd)
The same as above..
....
Executed multiple times or the same as above...

GRUB.EXE VER41

The result is the same.

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Floor 27 Posted 2007-10-08 17:17　·　中国山东聊城联通

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1. This win98.img can be normally booted with memdisk.
2. GRUB version 0.4.3 2007-10-08
3. Fault phenomenon: Freezes when starting Windows 98
4. Command line sequence
map (hd0,0)/boot/sources/win98.img (hd0)
map (hd0) (hd2)
chainloader (hd0)+1
boot

Floor 28 Posted 2008-04-09 17:38　·　中国河南郑州联通

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Floor 29 Posted 2008-05-06 16:24　·　中国广东汕头潮阳区电信

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These days the updates are really fast.
Support you

欢迎进入我的网盘！！！

Floor 30 Posted 2010-06-14 15:49　·　中国福建厦门电信

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