F0 43 7E 00 ss dd F7 - - O ●
11110000 F0 = Exclusive status
01000011 43 = YAMAHA ID
01111110 7E = Style
00000000 00 =
0sssssss ss = Switch No.
00H INTRO A
01H INTRO B
02H INTRO C
03H INTRO D
08H MAIN A
09H MAIN B
0AH MAIN C
0BH MAIN D
10H FILL IN AA
11H FILL IN BB
12H FILL IN CC
13H FILL IN DD
18H BREAK FILL
20H ENDING A
21H ENDING B
22H ENDING C
23H ENDING D
0ddddddd dd = Switch On/Off
00H (Off)
7FH (On)
11110111 F7 = End of Exclusive


Everything is in the PSR S950 Data Manual.
_________________________
DonM