View Full Version : 3.5 Floppy in a 5160?

October 11th, 2013, 12:00 PM
Hey guys,

Got my 5160 today. Opened it up. I think this has to be the cleanest 30 year old PC on the interior ever. I don't know where this has been stored, but there literally is not a spec of dust in it. Everything inside it almost looks new.

I do have a question though. It came with a 20MB HD, and 2 5.25" floppy drives. Am I able to replace a 5.25 with a 3.5" drive? If so, can it be a dual density 1.44, or would it have to be a 720?

Anyone know?

Al Hartman
October 11th, 2013, 12:39 PM
Unless you get a controller that can handle high density drives, you can only put a 720k 3.5" drive in the computer. You will have to use the DOS command DRIVPARM ( http://www.csulb.edu/~murdock/drivparm.html ) to tell the computer you have a 3.5" drive installed.

October 11th, 2013, 12:49 PM
If you wanted to write only 3.5 DSHD floppies, you might be able to pull the Amiga trick of modifying a drive to run at half-speed. That never struck me as a particularly great solution (shades of Weltech), but it's probably doable.

October 11th, 2013, 01:40 PM
Unless you get a controller that can handle high density drives, you can only put a 720k 3.5" drive in the computer.
A 1.44M drive can be connected to the IBM supplied controller - it's just that only 720K diskettes will work in it.
If you have an early 5160, then DRIVER.SYS will need to be loaded only if you want to format 720K diskettes in that configuration.
More information on this subject is [here (http://www.minuszerodegrees.net/5150_5160/720k/5150_5160_boot_using_720k.htm)].

October 11th, 2013, 01:48 PM
If you want 1.44M diskette operation for the IBM 5160, then some possible options are:

* Option #2 at [here (http://www.minuszerodegrees.net/transfer/35_inch/35_inch_drive.htm)]. Such a card is the XT-FDC card, created by forum members. See [here (http://www.vintage-computer.com/vcforum/showwiki.php?title=XT-FDC+Rev1&redirect=no)].
* Option #3 at [here (http://www.minuszerodegrees.net/transfer/35_inch/35_inch_drive.htm)]. On eBay presently.
* Option #4 at [here (http://www.minuszerodegrees.net/transfer/35_inch/35_inch_drive.htm)].

October 12th, 2013, 06:10 AM
Can be done but as mentioned your limited to 720k unles you use one of the above Option's. Also you will need to build or modify the drive cable itself. The 5.25" drives have a card edge connector the 3.5" has a pin edge. So you can either get an adpator for the card edge to pin type connector. Like this: http://www.ebay.com/itm/Floppy-Drive-Adapter-5-25-to-3-5-1-44MB-CE-2-for-AT-286-386-/171145147344?pt=US_Vintage_Computing_Parts_Accesso ries&hash=item27d90bb3d0

And one of these: http://www.ebay.com/itm/3-5-to-5-25-DRIVE-BAY-COMPUTER-CASE-ADAPTER-MOUNTING-BRACKET-USB-HUB-FLOPPY-/150793104037?pt=US_Computer_Case_Accessories_Tool_ Kits&hash=item231bf82aa5

Last item you can get at tigerdirect in Altamonte in the Hard drive area. And of course a Black floppy drive to match the other drive.

Hope this helps you. Oh and I am using PC-DOS 3.3 and it automatically formats to to 720k. To get 720k on a 1.44 you will need to cover the density select hole on the opposite site of the write protect hole with a piece of tape.

Good luck Sprinbok. If you need more help you have my number.