China DOS Union

That's good. I put it in the WinXP boot menu of the hard drive. Now, after my hard drive starts, an automatic boot menu appears, which has the following options:

Microsoft MS-DOS 7.10 (After entering this option, there are also Win98, Win3.x, DOS6, etc.)
Microsoft Windows ME
Microsoft Windows 2000 Professional
Microsoft Windows XP Professional
Datalight ROM-DOS 7.10
Boot from Floppy Drive A: (Boot from floppy disk)
Boot from CD-ROM Drive (Boot from CD-ROM)

Especially in this way, an old computer of mine whose BIOS doesn't support booting from the CD-ROM can also boot from the CD-ROM!

I read this article, and if I guess correctly. Breaking the 2.88M limit actually uses a hard disk image. I need to make a sample to test. Then where can I download RAMDISK/Acronis PartitionExpert 2003 (full version or with a keygen)?

Download at the address on the 12th floor. After testing, tell us in detail about your experiences and insights.

Is it achieved by modifying boot.ini?

How to do these in BOOT.INI?

The following is the speech of Wengier on 2003-5-2 6:15:29:
Not bad, I put it into the WinXP boot menu of the hard disk. Now after my hard disk starts, a boot menu will automatically appear, and there are the following options in it:

Microsoft MS-DOS 7.10 (After entering from this option, there are also Win98, Win3.x, DOS6, etc.)
Microsoft Windows ME
Microsoft Windows 2000 Professional
Microsoft Windows XP Professional
Datalight ROM-DOS 7.10
Boot from Floppy Drive A: (Boot from floppy disk)
Boot from CD-ROM Drive (Boot from CD-ROM)

Especially in this way, an old computer of mine whose BIOS does not support booting from the optical drive can also boot from the optical drive!

Add a line in BOOT.INI:
C:\BOOTCD.DAT="Boot from CD-ROM Drive"
And place the files BCDL.BIN and VIDE-CDD.SYS (I have replaced it with version 2.14) in C:\, and use SRCBOOT to save the boot sector of the disk where BCDL is located and modify it (must be modified, otherwise it cannot boot) and then save it to the C:\BOOTCD.DAT file.

What needs to be modified?
Dear Wengier, can you add bcdl to your boot disk, similar to jo.sys, to choose to boot from hard disk, floppy disk and CD-ROM?

The following is the speech of Wengier on 2003-5-2 20:06:32:
Add a line in BOOT.INI:
C:\BOOTCD.DAT="Boot from CD-ROM Drive"

And put the files BCDL.BIN, VIDE-CDD.SYS (I have replaced it with the 2.14 version) into C:\, and use SRCBOOT to save and modify the boot sector of the disk where BCDL is located (must be modified, otherwise it cannot boot) and then save it to the C:\BOOTCD.DAT file.

There should be hope. I renamed bcdl.bin to JO.SYS and replaced the original one, and then it booted from the CD.

Change to JO.SYS, why didn't I think of it earlier?

Changing the light to JO.SYS doesn't work. I tried that at first, but it didn't work. Because the startup partition it requires is different from the standard one.

I also tried. The machine hung. How to modify the content of the boot sector you mentioned just now

Down?
I only tried it on VMware 4.0, which was reading a floppy disk and then booting from the CD.

Is there a conflict between the bcdl.bin file and the core boot file of DOS on the boot floppy?
I wrote it to the floppy, and it can boot from the CD, but after writing the DOS boot file, it can only boot from DOS.
I don't know how to set it on the boot floppy to meet the requirement of choosing the boot.

I'm researching syslinux to see if it can meet the requirements.
If it really doesn't work, I'll rewrite SYSLINUX myself since there's source code.

The following is the speech of Master Rushi on 2003-5-3 0:14:43:
Is there a conflict between the bcdl.bin file and the core boot file of DOS on the boot floppy disk?
I wrote it to the floppy disk, and it can boot from the CD, but after writing the DOS boot file, it can only boot from DOS.
I don't know how to set up on the boot floppy disk to meet the requirement of choosing the boot.

The boot sector of BCDL is incompatible with that of DOS, so they cannot coexist directly. Instead, you can use the boot menu of WinXP or similar methods to achieve dual-booting.

As for the modification method asked by nre, you can just edit the information at the beginning of BOOTCD.DAT.