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Eigen PC: CD-ROM 37
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EPC_47.BIN
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CMOSPass
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README.TXT
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1999-05-09
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3KB
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CmosPwd 1.5 is a cmos/bios password recovery tool.
It's freeware. You can freely distribute it.
Bios and history
Acer/IBM 1.3
AMI BIOS 1.0
AMI WinBIOS (12/15/93) 1.4d
AMI WinBIOS 2.5 1.0
Award 4.5x 1.0 & 1.4c
Compaq (1992) 1.0
Compaq (Try...) 1.4
Dell version A08, 1993 1.0
IBM (PS/2, Activa ...) 1.3
IBM Thinkpad boot pwd 1.5
IBM 300 GL 1.5
Packard Bell Supervisor/User 1.4
Phoenix 1.00.09.AC0 (1994) 1.0
Phoenix 1.04 1.4
Phoenix 1.10 A03/Dell GXi 1.4c
Zenith AMI 1.5
Usage
cmospwd [/f] [/d]
cmospwd [/f] [/d] /[rlw] cmos_backup_file restore/load/write
cmospwd /k kill cmos
cmospwd [/f] /m[01]* execute selected module
/f AZERTY keyboard
/d to dump cmos
/m0010011 to execute module 3,6 and 7
Platforms
- Dos-Windows version
Well, ... it works!
- Linux version
Users can work on cmos backup but they need root priviledge to
use ioperm function to have full access to cmos.
- Windows NT
You can only work on cmos backup under NT.
Input/output functions are priviledge instructions and don't work in ring 3.
Divers
- Award 4.50PG
There is an universal password AWARD_SW.
(d8on, 589589 ... works too)
- COMPAQ LTE 5300 notebook
Tolga Sinan Guney: there is a reset jumper on the motherboard
- DIGITAL PC300, Phoenix 4.0 Rel 6.0,0
Rene Pocisk: cmospwd /k works
- DELL Latitude CPi 233ST Notebook
Ole Jensen: passwords are stored in EEPROM
- Fujitsu ICL
aksion: passwords are stored in EEPROM
- Hewlett Packard
Passwords are often (always) stored in EEPROM
There are reset jumper on some models
What to do if you cann't use cmospwd to clear your cmos ?
You can use debug to reset cmos CRC stored at 0x2E-0x2F
debug
-o 70 2E
-o 71 0
-q
What to do if cmospwd don't work on your PC ?
Try to clear password with cmospwd /k.
If cmospwd /k doesn't work, password is stored in an EEPROM. Try to find a
reset jumper on your motherboard or contact your PC vendor.
If it works, I can try to discover how passwords are encrypted.
I need to know what Bios you used and
some cmos memory backup with their passwords. (cmospwd /w backupfile)
For passwords, choose
some 1 and 2-letter passwords
BBBBBBB
BBBBBBC
BBBBBCB
BBBBCBB
BBBCBBB
BBCBBBB
BCBBBBB
CBBBBBB
Thanks to
- Philippe Garcia-Suarez
- Mark Miller
- Ian Sharpe
and to all the guys, who provided information about cmos and reported bugs.
If you have problems or questions about cmospwd,
please mail me.
Christophe GRENIER
grenier@esiea.fr
http://www.esiea.fr/public_html/Christophe.GRENIER/