Here's a simple BASIC program that plays a tune on the YM2151. (requires emu r39 or later as the YM2151 address changed)
Quote
10 YA=$9F40:YD=YA+1
11 SP=700
20 FOR CH=0 TO 7 :GOSUB 10000 :NEXT CH
30 POKE YA,$28 :POKE YD,$2E :REM MIDDLE C
40 REM
41 REM
100 READ CH : IF CH>7 THEN 7000
110 IF CH<0 THEN 200
120 READ NO : IF NO = 0 THEN 140
130 GOSUB 9000
131 GOTO 100
140 GOSUB 9100
141 GOTO 100
200 IF CH <> -99 THEN 220
210 RESTORE :GOTO 100
220 FOR I=1 TO SP :NEXT I : GOTO 100
7000 FOR CH = 0 TO 7 :GOSUB 9100 : NEXT CH
7010 PRINT "BAD SONG DATA AT CH=";CH
7020 END
7100 FOR CH = 0 TO 7 :GOSUB 9100 :NEXT CH
7110 END
8000 DATA 0,$1E,-1,1,$21,-1,2,$23,-1,3,$28,-1
8001 DATA 0,$2E,-1,1,$31,-1,2,$33,-1,3,$38,-1
8002 DATA 0,$3E,-1,1,$41,-1,2,$43,-1,3,$48,-1
8003 DATA 0,$4E,-1,1,$51,-1,2,$53,-1,3,$58,-1
8004 DATA 0,$5E,-1,1,$58,-1,2,$53,-1,3,$51,-1
8005 DATA 0,$4E,-1,1,$48,-1,2,$43,-1,3,$41,-1
8006 DATA 0,$3E,-1,1,$38,-1,2,$33,-1,3,$31,-1
8007 DATA 0,$2E,-1,1,$28,-1,2,$23,-1,3,$21,-1
8008 DATA 0,$1E,-1,1,$21,-1,2,$23,-1,3,$28,-1
8009 DATA 0,$2E,-1,1,$31,-1,2,$33,-1,3,$38,-1
8010 DATA 0,$3E,-1,1,$41,-1,2,$43,-1,3,$48,-1
8011 DATA 0,$4E,-1,1,$51,-1,2,$53,-1,3,$58,-1
8012 DATA 0,$5E,-1,1,$58,-1,2,$53,-1,3,$51,-1
8013 DATA 0,$4E,-1,1,$48,-1,2,$43,-1,3,$41,-1
8014 DATA 0,$3E,-1,1,$38,-1,2,$33,-1,3,$31,-1
8015 DATA 0,$2E,-1,1,$28,-1,2,$23,-1,3,$21,-1
8016 DATA 0,$1A,-1,1,$1D,-1,2,$1E,-1,3,$24,-1
8017 DATA 0,$2A,-1,1,$2D,-1,2,$2E,-1,3,$34,-1
8018 DATA 0,$3A,-1,1,$3D,-1,2,$3E,-1,3,$44,-1
8019 DATA 0,$4A,-1,1,$4D,-1,2,$4E,-1,3,$54,-1
8020 DATA 0,$5A,-1,1,$54,-1,2,$4E,-1,3,$4D,-1
8021 DATA 0,$4A,-1,1,$44,-1,2,$3E,-1,3,$3D,-1
8022 DATA 0,$3A,-1,1,$34,-1,2,$2E,-1,3,$2D,-1
8023 DATA 0,$2A,-1,1,$24,-1,2,$1E,-1,3,$1D,-1
8024 DATA 0,$1A,-1,1,$1D,-1,2,$1E,-1,3,$24,-1
8025 DATA 0,$2A,-1,1,$2D,-1,2,$2E,-1,3,$34,-1
8026 DATA 0,$3A,-1,1,$3D,-1,2,$3E,-1,3,$44,-1
8027 DATA 0,$4A,-1,1,$4D,-1,2,$4E,-1,3,$54,-1
8028 DATA 0,$5A,-1,1,$54,-1,2,$4E,-1,3,$4D,-1
8029 DATA 0,$4A,-1,1,$44,-1,2,$3E,-1,3,$3D,-1
8030 DATA 0,$3A,-1,1,$34,-1,2,$2E,-1,3,$2D,-1
8031 DATA 0,$2A,-1,1,$24,-1,2,$1E,-1,3,$1D,-1
8999 DATA -99
9000 REM PLAY NOTE ON CHANNEL CH
9010 POKE YA,8 :POKE YD,CH :REM RELEASE KEY
9020 POKE YA,$28+CH :POKE YD,NO
9030 POKE YA,8 :POKE YD,$78+CH :REM KEY DOWN
9040 RETURN
9100 REM RELEASE CHANNEL CH
9110 POKE YA,8 :POKE YD,CH
9120 RETURN
10000 REM SET CH= VOICE NUMBER AND GOSUB HERE TO LOAD PATCH
10001 REM CRYSTAL-2
10002 POKE $9F40,$20+CH : POKE $9F41,$FC
10003 POKE $9F40,$38+CH : POKE $9F41,$00
10004 POKE $9F40,$40+CH : POKE $9F41,$3A
10005 POKE $9F40,$48+CH : POKE $9F41,$5A
10006 POKE $9F40,$50+CH : POKE $9F41,$32
10007 POKE $9F40,$58+CH : POKE $9F41,$42
10008 POKE $9F40,$60+CH : POKE $9F41,$1E
10009 POKE $9F40,$68+CH : POKE $9F41,$14
10010 POKE $9F40,$70+CH : POKE $9F41,$0A
10011 POKE $9F40,$78+CH : POKE $9F41,$0A
10012 POKE $9F40,$80+CH : POKE $9F41,$1F
10013 POKE $9F40,$88+CH : POKE $9F41,$1F
10014 POKE $9F40,$90+CH : POKE $9F41,$1E
10015 POKE $9F40,$98+CH : POKE $9F41,$1E
10016 POKE $9F40,$A0+CH : POKE $9F41,$0C
10017 POKE $9F40,$A8+CH : POKE $9F41,$0C
10018 POKE $9F40,$B0+CH : POKE $9F41,$0F
10019 POKE $9F40,$B8+CH : POKE $9F41,$0F
10020 POKE $9F40,$C0+CH : POKE $9F41,$0B
10021 POKE $9F40,$C8+CH : POKE $9F41,$0B
10022 POKE $9F40,$D0+CH : POKE $9F41,$0B
10023 POKE $9F40,$D8+CH : POKE $9F41,$0B
10024 POKE $9F40,$E0+CH : POKE $9F41,$34
10025 POKE $9F40,$E8+CH : POKE $9F41,$34
10026 POKE $9F40,$F0+CH : POKE $9F41,$66
10027 POKE $9F40,$F8+CH : POKE $9F41,$66
10028 RETURN
If you're still running R38, then you can fix it by changing $9F40 to $9FE0 and $9F41 to $9FE1
Enjoy!