JiffyDOS 64 KERNAL ROM Overlay Image

RETRO Innovations

(11 reviews) Write a Review
$8.00
SKU:
JD64-Image
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Product Overview

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.

Notes:

  • 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 RETRO Innovations for bulk purchase information.
  • Since this is a digital download, we do not offer refunds for this purchase.  Please see our Returns and Refunds page for additional clarity.

Reviews

(11 reviews) Write a Review

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  • 5
    1541 Ultimate II

    Posted by Dave Provencher 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.

  • 5
    The turbo for my good old friend C64!

    Posted by H.Liebfried 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.