The multi-system boot disk for MS-DOS and ROM-DOS made by me with GRUB - China DOS Union Forum

I just used the GRUB boot manager to create a multi-boot DOS startup disk for ROM-DOS, MS-DOS, hard disk, CD-ROM, etc., which can be easily selected during startup.

Although this startup disk includes two sets of DOS (ROM-DOS 7.10 and MS-DOS 7.10) and the GRUB boot manager at the same time, the actual total space occupied is not too large. I used the latest version of COMMAND.COM (45KB) of ROM-DOS 7.10 as the common command processor for ROM-DOS and MS-DOS. This time, the compatibility is very good, and a lot of space occupation is saved. The combined ROM-DOS and MS-DOS systems are only IO.SYS (125KB) + IBMBIO.COM (75KB) + COMMAND.COM (45KB) = 245KB. Plus the GRUB boot manager (72KB), it's only 317KB in total.. In contrast, the DOS startup disk that comes with Win98 has IO.SYS (224KB) + COMMAND.COM (94KB) = 318KB.. It can be seen that the combined size of GRUB + MS-DOS 7.1 + ROM-DOS 7.1 is even smaller~~

Other features: fully supports FAT32 partitions, large hard disks, large memory, mouse, CD-ROM, etc...

The download is provided below, everyone can give it a try:
Open the attachment Link is invalid (Administrator note)

Cool!! Dual DOS System Boot Disk~~

After I used it, I found that the conventional memory is only more than 400 KB~~

Can I ask a few questions? How do the.bs files in the /boot directory come about?

The following is a quote from kevinet at 2003-6-20 17:37:17:
Can I ask a few questions?
How do the.bs files in the /boot directory come about?

It's the boot sector

Roy, can you introduce the usage of GRUB in detail?? Thanks~

.bs There is a tool in syslinux that saves the boot sector of a floppy disk as.bs.

WINIMAGE, BOOTPART, or any hex editor can be used to extract the boot sector of a floppy disk into a file.

The following is a quote from Dark-Destroy on 2003-6-20 7:01:19:
After I used it, I found that the conventional memory is only more than 400KB~~

This is just the framework of the startup management of the subsequent Emergency Boot Disk of China DOS Union. The subsequent parts are used together!

The following is a quote from Dark-Destroy on 2003-6-20 2:48:53:
Cool!! Double DOS system boot disk~~

Then this is even more amazing......Open the attachment
FreeDOS beta 8 + ROM-DOS 7.1 + MS-DOS 7.1 boot disk.....
Wengier: It is recommended to set the attributes of stage1 and stage2 to RASH..... To prevent improper operations such as defrag from making GRUB inoperable

Now MS-DOS 7.1 can avoid the logic lock, then how great is its practicality?

The following is a quote from Dark-Destroy on 2003-6-21 11:24:34:
How practical is it now that MS-DOS 7.1 can bypass the logic lock??

It's useful in MenuetOS

How to say??
What's the use??

The following is a quote from Dark-Destroy on 2003-6-21 11:32:05:
How to say??
What is it for??

MenuetOS has poor support for FAT32... It has no support for FAT16 at all...
Dual-booting with FreeDOS can make up for the deficiencies...

But how many people use MenuetOS??
Then might as well use MS-DOS 7.1~~

It's better to use MS - DOS 7.10 + Qube than MenuitOS.

Floor1　Wengier	Posted 2003-06-20 00:00
系统支持　Posts 10,521　Credits 27,736
I just used the GRUB boot manager to create a multi-boot DOS startup disk for ROM-DOS, MS-DOS, hard disk, CD-ROM, etc., which can be easily selected during startup. Although this startup disk includes two sets of DOS (ROM-DOS 7.10 and MS-DOS 7.10) and the GRUB boot manager at the same time, the actual total space occupied is not too large. I used the latest version of COMMAND.COM (45KB) of ROM-DOS 7.10 as the common command processor for ROM-DOS and MS-DOS. This time, the compatibility is very good, and a lot of space occupation is saved. The combined ROM-DOS and MS-DOS systems are only IO.SYS (125KB) + IBMBIO.COM (75KB) + COMMAND.COM (45KB) = 245KB. Plus the GRUB boot manager (72KB), it's only 317KB in total.. In contrast, the DOS startup disk that comes with Win98 has IO.SYS (224KB) + COMMAND.COM (94KB) = 318KB.. It can be seen that the combined size of GRUB + MS-DOS 7.1 + ROM-DOS 7.1 is even smaller~~ Other features: fully supports FAT32 partitions, large hard disks, large memory, mouse, CD-ROM, etc... The download is provided below, everyone can give it a try: Open the attachment Link is invalid (Administrator note)

Floor2　Dark-Destroy	Posted 2003-06-20 00:00
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Cool!! Dual DOS System Boot Disk~~

Floor3　Dark-Destroy	Posted 2003-06-20 00:00
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After I used it, I found that the conventional memory is only more than 400 KB~~

Floor4　kevinet	Posted 2003-06-20 00:00
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Can I ask a few questions? How do the.bs files in the /boot directory come about?

Floor5　Roy	Posted 2003-06-20 00:00
管理员　Posts 1,633　Credits 4,869
*The following is a quote from kevinet* at 2003-6-20 17:37:17:** Can I ask a few questions? How do the.bs files in the /boot directory come about? It's the boot sector

Floor6　Dark-Destroy	Posted 2003-06-20 00:00
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Roy, can you introduce the usage of GRUB in detail?? Thanks~

Floor7　nre	Posted 2003-06-20 00:00
银牌会员　Posts 361　Credits 1,210
.bs There is a tool in syslinux that saves the boot sector of a floppy disk as.bs. WINIMAGE, BOOTPART, or any hex editor can be used to extract the boot sector of a floppy disk into a file.

Floor8　Wengier	Posted 2003-06-20 00:00
系统支持　Posts 10,521　Credits 27,736
*The following is a quote from Dark-Destroy* on 2003-6-20 7:01:19:** After I used it, I found that the conventional memory is only more than 400KB~~ This is just the framework of the startup management of the subsequent Emergency Boot Disk of China DOS Union. The subsequent parts are used together!

Floor9　Roy	Posted 2003-06-21 00:00
管理员　Posts 1,633　Credits 4,869
*The following is a quote from Dark-Destroy* on 2003-6-20 2:48:53:** Cool!! Double DOS system boot disk~~ Then this is even more amazing......Open the attachment FreeDOS beta 8 + ROM-DOS 7.1 + MS-DOS 7.1 boot disk..... Wengier: It is recommended to set the attributes of stage1 and stage2 to RASH..... To prevent improper operations such as defrag from making GRUB inoperable

Floor10　Dark-Destroy	Posted 2003-06-21 00:00
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Now MS-DOS 7.1 can avoid the logic lock, then how great is its practicality?

Floor11　Roy	Posted 2003-06-21 00:00
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*The following is a quote from Dark-Destroy* on 2003-6-21 11:24:34:** How practical is it now that MS-DOS 7.1 can bypass the logic lock?? It's useful in MenuetOS

Floor12　Dark-Destroy	Posted 2003-06-21 00:00
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How to say?? What's the use??

Floor13　Roy	Posted 2003-06-21 00:00
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*The following is a quote from Dark-Destroy* on 2003-6-21 11:32:05:** How to say?? What is it for?? MenuetOS has poor support for FAT32... It has no support for FAT16 at all... Dual-booting with FreeDOS can make up for the deficiencies...

Floor14　Dark-Destroy	Posted 2003-06-21 00:00
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But how many people use MenuetOS?? Then might as well use MS-DOS 7.1~~

Floor15　Wengier	Posted 2003-06-21 00:00
系统支持　Posts 10,521　Credits 27,736
It's better to use MS - DOS 7.10 + Qube than MenuitOS.