Creating A Bootable Flash Drive

[joewillerols]

In Windows and DOS, I created a bootable FreeDOS flash drive using Rufus. So far so good. I then added HIMEM, EMM386, and a few other goodies to create a decent, colorful environment. From there the AUTOEXEC starts the main program on the flash drive. When the program ends, the screen tells you how to get back into the program. This was all done to simplify things for the user. So far so good. Then I used the latest version of Linux Mint and LMDE to create an ISO. Right click the drive, Compress, and choose ISO. That goes well enough.

The problem happens when putting the ISO file back onto the flash drive. Back in Windows, Rufus says the ISO is non-bootable so I used ISO2DISC. ISO2DISC does what it is supposed to do. It copied everything back to the flash drive with no errors.

Here is the problem. When the computer boots off the flash drive, I get a BOOT MGR missing error. Why? If the flash drive boots up before creating an ISO, and creating an ISO copies a flash drive verbatim, what is the ISO missing?

Help!

Thanks,
Joe

 

[Rick998]

Here is the REAL problem.
You have not once mentioned which ISO file you are trying to make bootable.
All the rest of your post is irrelevant until you provide that crucial information.