All of my joystick ports were on sound cards. As for the IDE controller, a lot of computers in the late 80s and early 90s only had one IDE channel, and it was pretty common to buy a sound card and CD-ROM at the same time (I remember the first ones my family bought were bundled in a "multimedia upgrade kit"). If you already had two hard drives, you were short on options, except that the sound card provided a solution.
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