Questions tagged [jiffydos]

JiffyDOS is an alternative DISK ROM for Commodore based computers and drives that aims to improve speed and reliability

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Why do many JiffyDOS users install a toggle switch to disable it?

For those that don't know, JiffyDOS is a ROM replacement for a Commodore 64 (and 128, I believe) and its 1541 disk drive. This ROM replacement provides OS shortcuts, faster load times, etc. I've ...
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How can you tell if JiffyDOS is installed on a drive without opening it?

Is it possible (and if so, how) to tell if a drive has JiffyDOS installed without opening it and looking for the chip?
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