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JiffyDOS is a fast-loading disk operating system (DOS) for Commodore computers (including the C64, C128, VIC-20, and others). Developed by Maurice Randall (based on earlier work by Mark Fellows), it replaces the built-in ROM routines of the Commodore drive (e.g., 1541, 1571) and the computer itself. The result is significantly faster disk access—often 5–10× speedup for load, save, and directory operations compared to the stock Commodore DOS. jiffydosc64bin hot
To get JiffyDOS working, you generally need the ROM for both the computer and the drive. 1. For Emulators (VICE, MiSTer) In emulators like MiSTer FPGA , you simply point the settings to your Kernal ROM: Set this to your jiffydosc64.bin Drive ROM: : JiffyDOS is a fast-loading disk operating system
This simply refers to the JiffyDOS ROM image specifically compiled for the (and compatible drives). It is distinct from versions for the C128, VIC-20, or Plus/4. To get JiffyDOS working, you generally need the
Depending on your setup (real hardware, C64 Ultimate, or emulator), use one of these commands: