This library supports a single IDE drive configured as master. Testing has been performed with an Arduino Mega 2560 and a Seagate Barracuda 7200.7 40 Gbyte drive (ST340014A). No additional components are required for operation..

Pin connections between Mega and IDE cable:

IDE Arduino Mega 1 /RESET 22 PA0 2 GND GND 3 D7 42 PL7 4 D8 37 PC0 5 D6 43 PL6 6 D9 36 PC1 7 D5 44 PL5 8 D10 35 PC2 9 D4 45 PL4 10 D11 34 PC3 11 D3 46 PL3 12 D12 33 PC4 13 D2 47 PL2 14 D13 32 PC5 15 D1 48 PL1 16 D14 31 PC6 17 D0 49 PL0 18 D15 30 PC7 19 GND GND 22 GND GND 23 /WR 23 PA1 24 GND GND 25 /RD 24 PA2 26 GND GND 30 GND GND 33 A1 26 PA4 35 A0 25 PA3 36 A2 27 PA5 37 /CS0 28 PA6 38 /CS1 29 PA7

If you want a drive activity light, add

39 /ACT to LED tied to Vcc via 470 ohm resistor.