CompactFlash IDE Daughterboard for MPU302

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 of board with features pointed out

operation of the board: 5V connection, 2.5mm jack required

Schematic was created with IVEX WinDraft.

Gerber files. IVEX WinBoard is used to created the pc board. The boards were manufactured by Seeed Studio.

Part list

connector definition DIN41612 & SPI & 2nd serial

step-by-step build process

Above is a high-resolution bare pc board for reference

1. Solder C7, the 10uF SMT capacitor. The end marked with black line should align with the taper end (marked with '+') of the silkscreen.
2. Solder resistor R1, R2. Both are 4.7K 1/8W resistor.
3. Solder U2, 74AHC00 or 74HC00.
4. Solder C1-C4, bypass capacitors
5. Solder P1, the 44-pin CF adapter. Lay the adapter flat in the same plane as the pc board with pins centered on the pads. Solder just one pad, inspect the alignment and make adjustment as needed. Solder rest of the pads, top and bottom.
6. Solder U1, the DIN41612 connector. Orientate the connector so the polarized tabs line up with the silk screen. ← a photo is needed Solder just one pin, inspect the connector for proper seating and perpendicular to the board before complete the soldering.
7. Solder J1, the 2.5mm power jack. The power jack fits rather loosely so solder just one terminal, inspect for proper alignment before complete the soldering.
8. Solder the 4-pin header strip and the 5-pin header strip.

final product

ss