China DOS Union

Asking everyone: How to load the DOS system into the ROM chip (the purpose is to run the DOS system in the ROM, excluding commands related to disk operations), completely abandoning external storage devices such as floppy disks and hard disks! Thank you everyone!

Write the DOS system files into the ROM using the corresponding encoder (programmer) and call them at an appropriate time.

Thanks to DOSLOOK, I have a programmer. After writing the DOS system files, how does the BIOS boot DOS? Do I need to modify the BIOS? Please give me some advice! Thanks!

You should have at least one bootable disk!

If you use a boot disk, why do you still write DOS into the ROM?

My idea is to completely abandon external storage devices such as soft disks and hard disks, and expand on an 8139 network card or other boards, write DOS into ROM, and use it to boot the system! Sincerely hope that all of you will give advice! Thank you!

Unless booted with an 8139 network card! Install a boot chip on the 8139 network card!

Using 8139 is a good choice. The problem is how to make the BIOS boot into DOS. Please give me some advice! Thanks a lot!

Need to modify the DOS boot sector code to convert the ROM address to the disk space address. DOS is Disk Operating System, and without a disk, a virtual one must be created. At present, it is necessary to call DOS files on the hard disk, floppy disk, or virtual disk space to boot the system.

However, besides MS-DOS, there are other DOS systems that can be embedded in ROM.

Hello everyone! This is a very nice idea, because I've always wanted to implement this function too, but I've been unable to do so, alas!
If the "8139 network card boot" is possible, then just write it into the motherboard's BIOS, because when I was doing diskless, I always added the network card's boot program to the motherboard's BIOS, but I completely discarded the soft, hard disk and other external storage devices and don't know how to start from DOS directly entered by the motherboard's BIOS. I'm thinking that if the motherboard can directly treat the BIOS space as drive A, then it can be achieved, because the ROM of my motherboard is 4MB, but actually only 2MB is used, and 2MB of space is enough to make a boot disk.

[ Last edited by quan_zhou on 2005-10-26 at 10:49 ]

Have a bright future and is worth paying attention to.

Is your motherboard's BIOS ROM 8 MBit or 8 MByte?

RE fdsiuha
My motherboard ROM has a capacity of 4MB, and the ROM model is SST 49LF004B.
I once used an 8MB ROM on my home Tianhong 810 motherboard, and there are such ROMs available in the electronics city.

It is indeed 4Mbit. Divided by 8, it gets.5MB. The basic DOS system can be installed. 8Mbit cannot hold all the contents of a 1.44MB boot disk.

[ Last edited by fdsiuha on 2005-10-29 at 16:59 ]

Yeah! 49LF004B only has 524288 bytes, and at least there should be BIOS content! But it can be extended to 8Mbit, 16Mbit, 32Mbit, etc. using TSOP's 28F008\016\032. It's better to make it into a USB ROM card, which is more convenient and no need to modify the BIOS.