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The IDE-CF daughterboard plugs into MPU302 to add additional drives to CP/M-68K. BIOS version MPUBIOS_v2 will detect the presence of the IDE-CF daughterboard automatically and assign four 8-megabyte drives, D: thru G:. Older version of MPU302 may not have the most recent BIOS, please refer to CPM BIOS Update section of MPU302 Software Updates for instruction on BIOS update.
photo above shows the major features of the CF IDE daughterboard. The CompactFlash connector and DIN41612 are keyed so they can be connected only one way. The 5V power to MPU302 and daughterboard is supplied via the 2.5mm power plug. The center lead is 5V while the barrel is ground. When the daughterboard is plugged into MPU302, 5V power must come in via the 2.5mm plug. This is because 5V is shorted to ground when the 2.5mm plug is not inserted. The 4-pin header and 5-pin header are for serial port and SPI port, respectively.
Schematic was created with IVEX WinDraft.
Gerber files. IVEX WinBoard is used to created the pc board. The boards were manufactured by Seeed Studio.
DIN41612 connector definition.
Above is a high-resolution bare pc board for reference