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JiffyDOS Kernal Upgrade
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== Switching ROMs with the power on == JiffyDOS is designed to allow the Kernal or DOS ROM selection to be switched while the system is powered on โ useful when a heavily copy-protected program will not load with JiffyDOS selected but will run fast once it is up.<ref name="man" /> '''The one precaution is that no disk access may be in progress when you switch''': toggling during a drive access will hang the system. CMD also warns that switching the Kernal while a program is running is not 100 % reliable โ the program may crash on the switch or hang on the next device access.<ref name="man" />
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