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JiffyDOS 64 KERNAL ROM Overlay Image

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Product Description

JiffyDOS is a Disk Operating System (DOS) enhancement which gives your C-64 or C-128 the disk access speed it has always needed. A chip-for-chip replacement for the Kernal ROM in your computer and the DOS ROM in your disk drive(s), JiffyDOS achieves levels of performance and compatibility unmatched by other disk speed-enhancement products. Outstanding speed, solid compatibility with virtually all hardware and software, and a new set of desperately-needed commands and features, gives your system a new lease on life and the power to compete with today's newer, more-expensive machines.

JiffyDOS should not be confused with Cartridges, Turbo ROMs, Burst ROMs or "Parallel" systems. Ultra-high-speed multi-line serial technology enables JiffyDOS to outperform these products without any of their inherent disadvantages. JiffyDOS leaves all ports on your computer open, works with virtually all software, speeds up PRG, SEQ, REL and USR files, and does not require any extra cabling. Owning JiffyDOS also gives you access to some of the best product support available.

Note: This purchase provides the buyer a license to utilize the downloaded ROM overlay image on one computing device or emulation environment.  Each use must have a separate license for legitimate operation.  Please contact Brain Innovations for bulk purchase information.

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Product Reviews

  1. Perfect with Easy Flash 3 :-) 5 Star Review

    Posted by on 12th Oct 2018

    Works nicely with Easy flash 3 and Jiffydos 1541 overlay with a PI1541

  2. top floppy disk accelererator for commodore c64 5 Star Review

    Posted by on 12th Nov 2017

    Excellent product for any Commodore C64. Definitely one of the best with many variations (patches) out there. Instant delivery after buying it with a download link. I used it to burn an Eprom for my C64 Reloaded board. This is the software needed for replacing original kernal rom (IC / chip) with an Eprom (IC /chip) for c64 to gain speed for floppy disks. Thank you Retro Innovations for making it available.

  3. works on easyflash 3 5 Star Review

    Posted by on 15th Oct 2017

    This works great loaded onto easyflash 3, so no need to open up the good old C64.
    It really speed things up. And it seems to be compatible with all I tested.

  4. I love JiffyDOS! 5 Star Review

    Posted by on 17th Apr 2017

    It might be the best fastloader out there for C64. I got it for my C64 and 1541. It's so much faster, and the DOS wedge is easy to use.

  5. Excellent product 5 Star Review

    Posted by on 20th Jan 2017

    Very easy download and effective. This should work to use JiffyDOS with VICE and SCPU option.

  6. A money saving solution 5 Star Review

    Posted by on 23rd Feb 2016

    I like the idea of buying just the code each time because I can program an EPROM myself. That saves time, shipping and the end user some money.

  7. 1541 Ultimate II 5 Star Review

    Posted by on 6th Mar 2015

    Used this on my 1541 Ultimate II cartridge and the Jiffy Dos rom works great. It's great to find these products still available for the Commodore 64.

  8. The turbo for my good old friend C64! 5 Star Review

    Posted by on 31st Jan 2015

    In my case i'm using the kernal overlay in conjunction with a Ultimate 1541 II. Within two minutes i was able to enjoy the speed upgrade without even opening my C64. I just created a folder on my sd card and put the two needed overlays into it. Then setting the paths in the Ultimate 1541 and i was ready to check out the difference Jiffydos makes. The Ultimate 1541 II works like a charm with Jiffydos and i yet didn't notice a game that doesn't work with Jiffydos.

    What a tremendous enhancement for using the C64. As i "re-started" to use a real Commodore after such a long time i wasn't used to the hefty loading timed anymore. I said to myself to remember that waiting for the good old games to load is worth the time, but Jiffydos cuts off so many seconds/minutes that i have more time to enjoy playing instead of waiting.

    The few dollars it costs it brings a so much fun loading games on real hardware. Not often i made an investment in software that pays so much off.

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