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  • Top view of uIEC/SD with deluxe daughtercard.  2 IEC ports are under the uIEC/SD and the jack on the left side is for USB power.
  • Side view of uIEC/SD with Daughtercard
  • You can also plug uIEC/SD in at a right angle
  • uIEC/SD bottom view
  • uIEC/SD side view
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Product Description

Hold the entire collection of Commodore games and utilities in the palm of your hand! No more lugging a CBM disk drive around, worrying about disk “rot”, swapping disks, and being without your favorite software. Transfer files to the Commodore simply by dragging files to the solid state SD/SDHC card on your PC/Mac. Need more storage? Visit the local big box store or online e-tailer for gigabytes of solid state storage.

The “Micro” IEC offers that and more, supporting Secure Digital (SD) and SDHC solid state storage up to 32GB in size, emulating the CBM DOS functionality (including select CMD HD DOS operations), and supporting the JiffyDOS drive transfer protocol. The unit is small enough to embed, but large enough to satisfy even the most discerning retro-computer enthusiast.

The device even offers the ability to better itself after purchase. As new firmware updates are released, simply copy the new firmware to the SD card, reset the device, and watch it upgrade itself.

Think about it, this addition to your Commodore collection is new and costs less than the going eBay-rate for a 1581. But the Storage capacity is Far beyond a 1581! Switching out SD Cards (which are cheap) is a snap - each SD Card is like adding another free 1581 drive or any other 1571 or 1541 drive. And FAST, the uIEC is faster than any mechanical drive without wearing out parts!

All of this in 2.25 square inches of silicon and circuitry. Grab one or more today!


  • For correct operation, the unit requires a Commodore IEC serial cable (available in our store, though any disk drive serial cable should work)
  • In order to utilize the JiffyDOS transfer speeds, the computer must have JiffyDOS installed. JiffyDOS is available in our store.
  • uIEC/SD is available in 3 configurations:
    • bare: The unit comes without any daughtercard or connector.  This option is useful for folks wishing to add an additional unit to a uIEC/SD Deluxe Daughtercard
    • edge connector: The unit is supplied with just the 1x13 edge connector.  This is useful for folks planning to embed the uIEC/SD into another structure.
    • deluxe: The base unit is paired with a small PCB (this is useful for folks who desire less clutter and want the unit close to the machine. 
      The PCB provides:
      • 2 IEC ports (which allows daisy chaining)
      • buttons for swap list navigation
      • a reset button
      • a jumper configuration setting that allows or prevents a machine reset from also resetting the drive.
      • direct connection to the C64/C128 cassette port for power
      • dual uIEC/SD connectors, to allow vertical or horizontal configuration
      • Mini USB port for external power (use any standard 5V phone charger, or a cable to your PC

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Product Reviews

  1. uIEC/SD worth every penny 5 Star Review

    Posted by on 25th Apr 2012

    Purchased the uIEC/SD deluxe version, arrived well packaged and quickly. Got unit hooked up, did some research to find a fast loader,file browser and documentation for it as none was included. Within an hour I had set the default device set to 8, got a fast loader and file browser loaded and a bunch of disk images on an 8 GB card. A week into it and so far 90% of the disk images I tried run just fine, those that dont can be run by extracting the files out of the disk image. I am very pleased with my purchase and would recommend this to any Commodore 64 collector, next will be trying it on my Vic-20! Thanks to Retro Innovations for a great product at an very fair price.

    The fast loader software i am using is called SJLOAD and the file browser is called File Browser (fb64.prg).Dont want to put links to theme here but Google will help you find them.

  2. Amazing 5 Star Review

    Posted by on 28th Mar 2012

    I just got this yesterday -- the board is nicely done.

    I set up my C64 which has been in a box for probably 15 years. Then I located the documentation on uIEC (mentioned in another review here) and I was up and running with some D64 images I had. The initial uIEC experience could be much improved with a small "Getting Started" introduction. ;-)

    I have JiffyDOS which makes interacting with the uIEC really painless. And of course it makes everything load in a 'jiffy'.

    I also bought the ZoomFloppy. We'll see what luck I have archiving my old floppies. Then I can use those images with the uIEC.

    Thanks RETRO!

  3. Nifty device 5 Star Review

    Posted by on 19th Nov 2011

    I use the uIEC in conjunction with JiffyDOS, 1541U2, EasyFlash, 64NIC+ and it all works!

    Especially the EasyFlash'ing make life much more easy as the uIEC has raw data access to the SD card and even allows you to go through directories and select a 1Megabyte .CRT file.

    Please have a look at my blog: http://c64.berrydejager.com/?p=638

  4. Wonderful 5 Star Review

    Posted by on 15th Sep 2011

    Fantastic. Wonderful. Awesome. Insert any other effusive word you can think of. Worth every penny. Trouble-free installation and generally easy to use. Things like this keep the Commodore community alive. Keep up the great work!

  5. This thing is AWESOME! 5 Star Review

    Posted by on 1st Sep 2011

    I just received my unit and plugged it into one of my 128s. Once I figured out it was device 10 by default it worked like a charm!!!
    I was able to easily set it to default to device 8 and quickly got the hang of mounting the d64 images.
    Very well built and well worth the cost.
    About the only criticism would be that it didn't come with any docs and it was hard to find instructions at first.
    Here are some helpful links:


    You won't regret picking this up!
    And thanks for making it available, Jim.

  6. Super Flexible! Super Fun! 5 Star Review

    Posted by on 4th Apr 2011

    I just got this unit and it is awesome! I have Jiffydos installed on my c128 and they work together like a charm. I added a power supply from an iomega zip drive, since it runs at a constant 5v. It was $1.99 at goodwill and they had stacks of them. Good build quality. Just buy one or two.

  7. Store Your Whole C64 Library on one SD Card! 5 Star Review

    Posted by on 24th Feb 2011

    This little beauty works great on my beloved stock C64 computer! I can't say enough about this wonderful piece of hardware. I bought this after attending the Chicago Commodore show back in 2009 and it has been a joy to use. You can literally store your whole software library on one SD card (if you desire) and it is very, very easy to use. Using the micro SD device to store D64 images created by Jim Brain's new ZoomFloppy interface is one powerful combination!

    This is the kind of innovative hardware that would make Commodore proud if they were still around today. Thanks to Jim Brain for keeping the hobby alive and continuing to provide the Commodore enthusiast with fun, easy to use hardware. Thanks for bringing my C64 into the 21st century!

  8. Best HDD equivalent 5 Star Review

    Posted by on 21st Feb 2010

    I got this unit over a year ago and adapted it to run from external power supply in a small hammond project case. It really is an excellent device. It can handle both D64 images used by emulators and normal commodore files directly so you can connect this directly to most commodore 8bits with little effort and start using it. Works with most if not all SD or SDHC cards. One note: if you decide to use an external power supply as I did you must ensure that it is regulated to ensure no more than +5Volts reaches the uIEC. You can contact Jim Brain about that directly.

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