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View Full Version : Osborne 1 + Gotek Floppy Emulator SUCCESS!



redruM69
March 30th, 2017, 07:45 AM
For the past couple of months I have been fighting my Osborne (http://www.vcfed.org/forum/showthread.php?56134-Osborne-1-booting-woes&p=446538) trying to get it to boot from real floppies.

Lots of troubleshooting and spare parts later, I found that all 4 of my floppy drives are bad! Yesterday I successfully adapted the non-standard shugart interface to a Gotek Floppy emulator w/ HxC firmware installed. It boots up great now! I figured I'd share the cable adaption for others that want to attempt this. The Osborne floppy cable carries 12v and 5v power supply lines which need to be cut. Drive select pins are also a bit different, and there are some other un-needed pins. With some modifications to a standard floppy cable, it will work. I haven't tried it yet, but you should be able to use the Gotek drive on the end of a double cable, with an original drive on the other connector. This diagram has the drive select set as "A", but you can swap around those pins and make it drive "B".

http://i.imgur.com/rKmyFgrm.jpg (http://imgur.com/rKmyFgr) http://i.imgur.com/i10JrStm.jpg (http://imgur.com/i10JrSt)http://i.imgur.com/xMndlRXm.jpg (http://imgur.com/xMndlRX)

http://i.imgur.com/L3e9mgk.png

RizThomas
March 30th, 2017, 08:09 AM
Thanks for sharing. This info will come as big help for my Osborne1 where B drive is acting up now and then. If it is not too much to ask, can you also give me more info on the Gotek. I am more well versed on the Gotek for Amigas. Is this something I can buy from Lotharek or can I just order the firmware. Any info on the firmware version? Thanks

redruM69
March 30th, 2017, 10:07 AM
It's a cheap Gotek from eBay. The HxC firmware is available here for about $11: http://hxc2001.com/store/. You will also need a USB 3.3v TTL adapter to reprogram the bootloader.

redruM69
April 7th, 2017, 05:35 PM
All done!

http://i.imgur.com/EhWe9nUm.jpg (http://imgur.com/EhWe9nU)

http://i.imgur.com/SVqagNPm.jpg (http://imgur.com/SVqagNP)

http://i.imgur.com/7eeF6mBm.jpg (http://imgur.com/7eeF6mB)

Chuck(G)
April 7th, 2017, 05:39 PM
You might consider using some of the low-profile USB flash drives--I'd hate to see what the result would be if you closed the case without removing the USB stick!
:)

phogren
April 12th, 2017, 12:47 PM
I'm trying to do something like this for a Kaypro 2X. I have the Gotek drive and flashed it to where I have the 3 digit display saying "hXc" but I'm a little lost now. I know it needs the shugart emulator and something else on the USB drive but I am having a senior moment(s) and can't seem to find the correct files.

kbergphd
September 4th, 2017, 02:45 AM
Thanks for the post:D. I have been wrestling with my Osborne (I bought in 1982) for the past 3 years, but without success. Where did you get the boot program for the USB Drive to boot up the Computer? I am kind of a Newbie in figuring that out. I think I got the wiring OK, and am going to give this a try. Thanks again. Kent.

Alphasite
September 17th, 2017, 12:06 PM
I'm starting work on repairing an Osborne Executive. It's got one bad floppy drive. I tried a different (non-Osborne Executive) drive and it wouldn't work. Now that I see this thread I'm starting to wonder if the Executive is the same way. Does anyone know?