Circuit of the floppy disk interface. Not the usual circuit based upon a well-known FDC controller IC, but a simple and not so standard solution. The OS65D operating system from OSI, Ohio Scientific, knows how to handle this interface well, and just for this purpose, Elektor choose this solution.

	floppy disk interface for the Junior part 1
	floppy disk interface for the Junior part 2
	Sources and hex files of PMV, PM for VDU and OS65D
	Paperware 2V listing of bootstrap ROM ESS515
	Sources of ESS515 ROM
	ESS515 bootstrap ROM
	Paperware 3V PMV listing, adapt PM to VDU and OS65D

The next page gives information on OS65D, the operating system.