As at time of this writing, my notebook is a Windows 7 x64 Lenovo 4GB RAM, without fancy sound card. I had to install Loopbe1 freeware to get a virtual MIDI input device. I used Microsoft GS Wavetable Synth as default MIDI output device.
Here is how I found the place to set the MIDI input and output in Domino 1.42 Japanese version.
First, you can simply press F12. OR you can click on the File item ( top left item which has the " (F) " ) on the top menu bar, and you get this drop down menu. Select the item with the tool graphic ( the "F12" ).
Either way will open up the following pop-up window:
In the left pane, you will see MIDI-IN and MIDI-OUT listed among other items. First click on MIDI-IN. Then, for each of the items in the right pane, you need to click on the option bar (it has a small down arrow graphic). Select LoopBE Internal MIDI for each of the items (No idea about details; I just want to be sure I get everything played through my computer.)
Next, go back to the left pane and select MIDI-OUT.
Then, go to the right pane and click on each row of the MIDI-OUT column. Each row will open up the options available, like this:
Click the OK button to exit the pop-up window and return to the main workspace of Domino 1.42.