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== Physical Package == * '''Computer ROM''' β usually a 27128 (16 KB) EPROM on a 28-pin adapter PCB; early C64s with 24-pin 2364 mask ROMs need a pin-header adapter or board trace-cut. * '''Drive ROM''' β 27128/27256 EPROM; 1541 C and 1541-II need solderless swap, older 1541 drives may need a jumper moved from β24-pinβ to β28-pinβ. * '''Toggle switch''' β DPDT or SPDT depending on board, mounted through RF shield or case rear, selects between stock and Jiffy images. Retro Innovations sells both '''pre-programmed, legally licensed ROMs''' and '''download images''' for owners with their own EPROM burner. A computer set costs ~US $27 and each drive ROM US $19 (2024 price list).
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