Knights of the Round is an arcade game known for its multiple version sets. The variation in hardware (YM2151 + 2xMSM5205) indicates differences in sound chip implementation, implying potential audio variations across versions.  The different version sets, especially with the dates (911127), suggest refinements, bug fixes, or regional releases over time.  The gameplay likely involves action, possibly with RPG elements or fantasy themes judging by the title.

Knights of the Round (version set 1 (with YM2151 + 2xMSM5205), 911127 etc)

Knights of the Round (911127 USA)