Random battle theme

yeah you need to write your table entries as "db $56" instead of "56". Also you might want to change the two ".exit" to "exit" but those error might be cause by previous ones I'm not sure.

Ok, if I change the code to the following there are no more compile errors, but now the music is just the default in-game for the 3 backgrounds I changed:

Code:

hirom
header

org $C2BDB7
JSR free_space
NOP

org $C264C9          ; change to free space
free_space:
TDC
LDA $C2BF3B,X        ; load formation song
CMP #$24             ; check if battle song
BNE exit            ; branch if not
LDA $11E2            ; load battle background byte
AND #$3F             ; isolate battle background
REP #$20
TAX                  ; set BG as index
SEP #$20
LDA table,X          ; load BG song ID
exit:
RTS

; your $37 song IDs
; this table can be anywhere in the ROM:
org $F15550 ;(uncomment and change to move table elsewhere)
table:
db $56    ; W O B Grass
db $57    ; WOR Forest
db $66    ; W O B Desert
db $00    ; song ID for 4th background
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00
db $00