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Depending on your setup, there are a few "hot" ways to run JiffyDOS:
file is exactly 8KB (8,192 bytes). If it is larger, it may contain multiple ROM images (like a "switchable" Kernal) and needs to be split. No Speed Increase: JiffyDOS requires jiffydosc64bin hot
If "JiffyDOS C64BIN Hot" is a modern tool, it may share similarities with: Depending on your setup, there are a few