MSX means Machines with Software eXchangeability.
Was based on the Spectravideo SV 318.
courtesy of Tomi Engdahl Port on the MSX
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5\ o o o o o / 1
. \ o o o o /
.9 `~~~~~~~´ 6
1 Up
2 Down
3 Left
4 Right
5 Power
6 Button 1
7 Button 2
8 Output 3
9 Ground