Watching a video demo of the Korg M1 (the first digital ROMpler workstation):
Part 1:
Part 2:
VERY VERY bulky synth, but the sound is timeless and helped define certain genres, like House.
Thankfully, you can get the M1, the Wavestation (the M1 with vector synthesis), the T1, T2, and T3 (the sucessors to the M1, bigger sample ROM) all in VST format (and standalone program) as part of the Korg Legacy Collection: Digital Edtion.