In an earlier post, I talked about how to install AIX 4.2 on an RS600 ThinkPad. Here are some customizations you might want to try out after you have the operating system installed.
The IBM ThinkPad Power Series is a PowerPC-based line of laptops designed to run Unix or Windows NT. Because it's based on the PowerPC processor, you can't just install an operating system intended for Intel-based computers.
If you want to use one of the many great MIDI sequencers for Atari ST, or play a MIDI-compatible game the way it was meant to be experienced, you'll need a synthesizer. The mt32-pi project turns a Raspberry Pi into a MIDI synthesizer that can emulate the MT-32 and other synthesizers, and also supports General MIDI.
I've got three 16/32-bit Atari ST machines that I'm currently working on: two Atari 520 STEs that I acquired a while back, and the most recent addition, a Falcon 030. Both Atari STE computers are UK models, and expect that the mains power is operating at a 230V nominal voltage. US mains voltage is 120V.