You can use usbaspi.sys together with nj32disk.sys. Add these to CONFIG.SYS and it should work with FAT16 USB storage. Works for me in MS-DOS mode on Windows 95, so it should also work with DOS 6.22.

http://hddguru.com/download/software/USBASPI- … baspi-v2.20.zip
https://www.jumpjet.info/Application-Software … SK/NJ32DISK.zip

Have you tried this? http://bretjohnson.us/

aha2940 wrote on 2020-03-16, 03:50:

Have you tried this? http://bretjohnson.us/

Yes actually, one of his utilities revealed that my USB controller is UHCI, which doesn't seem to be compatible.

Lylat1an wrote on 2020-03-16, 03:59:

aha2940 wrote on 2020-03-16, 03:50:

Have you tried this? http://bretjohnson.us/

Yes actually, one of his utilities revealed that my USB controller is UHCI, which doesn't seem to be compatible.

You sure of that? because the documentation actually states that UHCI (made by intel and VIA) is the *only"compatible controller so far.

aha2940 wrote on 2020-03-16, 04:01:

Lylat1an wrote on 2020-03-16, 03:59:

aha2940 wrote on 2020-03-16, 03:50:

Have you tried this? http://bretjohnson.us/

Yes actually, one of his utilities revealed that my USB controller is UHCI, which doesn't seem to be compatible.

You sure of that? because the documentation actually states that UHCI (made by intel and VIA) is the *only"compatible controller so far.

Mine uses an SiS chip, maybe that was the reason.

I found a video on Youtube showing how to install a driver using one of the methods I tried before, but it's still not working for me.

https://www.youtube.com/watch?v=_cnTc9mMnpA

It seems he only adds two of the three files copied to the C: drive to CONFIG.SYS, and they seem to load on my machine, but they don't see my USB drive.

Do I need to do something with the DI1000DD.SYS file too?

As not all drivers works with all computers, I'd try to try either:
- The boot disk from Puppy Linux.
- Hiren's Boot CD.

They include plenty of drivers, and menu driven selection of drivers. So, you can boot from one of those and try one by one every driver until you found which one will work with your hardware. Then, look into CONFIG.SYS/AUTOEXEC.BAT to see how is it loaded and try it on your hard disk.

Check if your motherboard BIOS support USB legacy mode. You don't need any 3rd-party drivers for USB in DOS if the motherboard BIOS support USB legacy mode and you are using the USB controllers from the chipsets.

Legacy mode is for keyboard and mouse only, which appear as ps/2 devices then.

derSammler wrote on 2020-03-17, 07:44:

Legacy mode is for keyboard and mouse only, which appear as ps/2 devices then.

Sometimes yes, but not necessarily/not only.

E.g. contrary to the above with this board 'Legacy USB Support' also refers to USB Mass Storage Devices. If you disable 'Legacy USB Support' USB drives are also disabled and you cannot even boot from them:

Actually if you can boot from USB drives then your BIOS supports USB Mass storage devices as regular drives and no further drivers required regardless of OS. You only have to make sure that used file system is supported by your OS (in case of DOS it's FAT16/32).

Sorry I'm a beginner, can you tell me how to install these files?

Around 2001-2002 onward bios' from Award and AMI etc started supporting booting from USB Mass storage devices. It will then treat the usb device as a hard drive accessed via INT 13h extensions seen as 80h for first hard disk.
This is very good in Dos7.1(fat32 + unlike dos 6.22 it also supports int13 extensions for larger disk sizes) as you can use USB stick or external usb SSD hard drive without any usb drivers loaded in dos. It is supported transparently directly through the bios.

As an example my gigabyte g41 motherboard I have booted via a fat32 2TB external SSD usb drive (partitioned with diskpart in win10, then formated with Winme format.com and sysed for dos boot files). Dos 7.1 sees this a single 2tb fat32 partition. Speed is around 32MB/s in speedsys, so the bios is using usb2 speeds. Yes it's slow for ssd but around 30-35mb is max for usb2 throughput.
Of course the downside of all this is motherboards from 2002 and newer are not great in themselves for dos compatibility as they mostly lack ISA slots.
It would be great if bios modders could add USB Mass storage boot support as a module to older boards like the 440BX. Even though it's limited to usb1 speed, usb boot support adds a lot of flexibility.

So I should be installing DOS 7.1 and not 6.22?
This also explains why my Windows Workgroups 3.11 can't see the 32GB disk?

NarakuITA wrote on 2022-06-19, 19:18:

So I should be installing DOS 7.1 and not 6.22?
This also explains why my Windows Workgroups 3.11 can't see the 32GB disk?

Yes, Dos7.1 adds support for fat32, int13 extensions and partitions and disk sizes up to 2TB. The limit is dependent on the motherboard bios. If the bios supports 48bit lba , dos 7.1 will work with drives up to 2TB(mainly motherboard and bios made after 2002).
The other way is using an external PCI controller like the promise TX2. That also supports drives up to 2TB under dos 7.1