1541SJD41 (S-JiffyDOS 1541) is an extension for the original Jiffy DOS operating system. SJD41 can be used as an EPROM inside the 1541, but also with emulators, the 1541 Ultimate, or the Turbo Chameleon64. Features: Faster loading and saving. 40 Tracks compatible. GEOS validation and scratching. Extended disk drive status, and much more.


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