![]() ![]() BIOS is the thing software talks through when it has to access the hardware, and if BIOS doesn't know about HD floppy disks, then it can't make heads or tails when software tries to access one. Allthough having a 16-bit ISA connector, the FDC only uses the lower 8 bits, and as such it works just fine in 8-bit slots.īIOS support is nessecary. There are some dedicated 8-bit ISA FDCs with HD support, but you can often get away with a common 16-bit ISA multifunction card (like ). Hardware support is simply the floppy disk controller (FDC) and the drive. To get full 1.44MB capability, you need 3 different things that supports it: Hardware, BIOS and Software. I suppose you could also get the Backpack parallel-port CD-ROM and transfer lots more stuff that way but I just didn't want to mess with it. So even with the P4 PC available, I prefer the 3.5" disk method because they hold 4x as much and I can transfer from any modern PC to the PCjr that way. However, with this setup, I can only transfer 360k of stuff at once, and it's the only reason I even power on the P4 PC. For this work work, the floppies have to be formatted on the PCjr first. I also use it to create 360k boot floppies using downloaded. I also have an old P4 computer with a 5.25" drive (that's how I got the Backpack driver to my PCjr). With this set up I can copy 1.44MB of stuff at a time from the Internet to my PCjr, so I'm happy with it. I also bought a USB 3.5" drive for my other PCs (under $15 on Amazon), since none of them have any floppy drives at this point. However, you'll need to get the driver on to your system, and the package only comes with a CD-ROM. It works well, if a little slowly, on my PCjr with unmodified parallel port. I bought a MicroSolutions Backpack parallel port 3.5" drive off eBay.
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