I couldn't find any other obvious place to post about the older drum machines, so here's a video overview of one of Korg's classics from the mid-late 80's:
https://youtu.be/5k2cLKB4O8U
Korg Classics: DDD-1 Dynamic Digital Drums
Moderators: Sharp, X-Trade, Pepperpotty, karmathanever
Korg Classics: DDD-1 Dynamic Digital Drums
Current Korg: Volca Bass, Volca Keys, Volca FM ESX, monotron, monotron delay
Current other: Roland TR-8, TB-3, JU-06, TR-505, Novation Circuit, Yamaha DX-21, RX17, RX-8
Previous Korg: ER-1, EA-1, ES-1 mkii, SQD-8, DDD-1, DDD-5, KPR-77, 05R/W
Previous other: way too much
https://www.youtube.com/user/anode8
https://www.facebook.com/RonStechno/
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Current other: Roland TR-8, TB-3, JU-06, TR-505, Novation Circuit, Yamaha DX-21, RX17, RX-8
Previous Korg: ER-1, EA-1, ES-1 mkii, SQD-8, DDD-1, DDD-5, KPR-77, 05R/W
Previous other: way too much
https://www.youtube.com/user/anode8
https://www.facebook.com/RonStechno/
https://twitter.com/anode8