So, as it stands I have established the following:ġ. It gave me an error message "Format not supported.", I changed the extension of the file to VFD (virtual floppy drive), but still same error. Next, I made a VHD (virtual hard drive) image of the SD card with Ubuntu USB installation, and fed it to the TOSHIBA SD Memory Boot Utility. I then tried the Universal USB Installer again (this is the "pendrive" way) with the 2GB card. Like I said before, this BIOS does some fancy floppy emulation at boot. The TOSHIBA SD Memory Boot Utility formatted the SD with FAT32 and created an image file (!) on the SD, the file name is $TOSFD00.VFD on the SD (file size 1.4MB), that's the only file on the 2GB FAT32 partition. I then booted Windows to check the SD contents. ![]() The creation of the bootable SD with MS-DOS 6.22 succeeded, I was able to boot MS-DOS 6.22 from SD. I have an image of MS-DOS 6.22 floppy, I provided it to the utility. The utility wants either a floppy or an image file with extension. Unfortunately it does not support cards over 2GB in size, but now I have one to play with. Toshiba provides a utility for creation of bootable SD media for my laptop, it's called "TOSHIBA SD Memory Boot Utility", does what it says on the can :). I remembered that I did have a smaller 2GB SD card in my old Garmin GPS in my car, so I'm now working with that. I did mention above that I *do* have an option in BIOS to boot from SD. I just got MS-DOS to boot from an SD card in this internal card reader. ![]() Install to a USB flash drive and boot off a USB port. Your buil-in card reader is probably not bootable. ![]() The SD card is fine, I got another idea, perhaps it's the SD vs. Some internal card readers are wired to the USB bus, yours might be. But I have used usb readers too, neither gave any problems. The "SD reader" I referred to was the slot on the side of my laptop (/dev/mmcblk0p1). (I do have one laying around though, but again, it's not relevant) I use one to format SD and micro SD cards and to create bootable SD cards.
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