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中国DOS联盟论坛 » DOS启动盘 & LOGO技术 （启动盘室） » How to automatically switch to the CD-ROM drive letter after booting? View 1,424　Replies 5
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Original Poster Posted 2003-07-06 00:00　·　 中国 山东 济宁 联通
xp2002_xp
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I'm a newbie and don't know much about DOS.
I want to make a boot disk to serve as the boot files for a CD,
so that after the machine boots it can automatically switch to the CD-ROM drive letter.
Question: how should the batch file be written?
What other files are needed on the disk?

Please take the time to answer, thanks!!
Floor 2 Posted 2003-07-06 00:00　·　 中国 江苏 无锡 电信
wglwx
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If you already know how to use a boot floppy to make a bootable CD, and just don't know how to automatically switch to the CD-ROM drive letter after booting,
then you only need to solve the problem of finding the CD-ROM drive letter.
There are two methods:
1. Specify the CD-ROM drive letter: add /L:X at the end of the line containing MSCDEX.EXE in AUTOEXEC.BAT on the boot floppy (X can be replaced with other letters)
This method is simple and easy to use; beginners are advised to use it.
2. Use FINDCD.EXE to find the CD-ROM drive letter. This method is a bit more complicated; you can refer to the Super Moderator's MSDOS7.10 Super Boot Disk.

After deciding which method to use, add one line at the end of AUTOEXEC.BAT on the boot floppy:
X: (first method)
or
%CDROM%: (second method)

Then after booting it will enter the CD-ROM drive letter (of course, the first CD-ROM drive letter).

If you still don't know how to use a boot floppy to make a bootable CD, then first look at the old posts from before, learn that, and then do the above.
Floor 3 Posted 2003-07-06 00:00　·　 中国 山东 济宁 联通
xp2002_xp
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Thanks, brother wglwx!
I already know how to use a boot floppy to make a bootable CD.
My goal is: to use this disc to boot any machine and have it automatically switch to the CD-ROM drive letter.
Question:
Can method 1 achieve this goal?
Floor 4 Posted 2003-07-06 00:00　·　 中国 江苏 无锡 电信
wglwx
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Yes.

Note:
1.There should be this line in CONFIG.SYS: LASTDRIVE=Z
2.You can test with a floppy first, and burn the CD after it succeeds.
Floor 5 Posted 2003-07-07 00:00　·　 中国 山东 济宁 联通
xp2002_xp
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Floor 6 Posted 2006-10-22 00:41　·　 中国 北京 中国中信股份有限公司
shawell518
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Originally posted by xp2002_xp at 2003-7-6 12:00 AM:
Thanks, brother wglwx!
I already know how to use a boot floppy to make a bootable CD.
My goal is: to use this disc to boot any machine and have it automatically switch to the CD-ROM drive letter.
Question:
Can method 1 achieve ...



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