Hi! I wanna play a tune on the SB FM-chip-thing...
But my code isn't working? Can someone see why??
Bits 16
Org 0x0100
xor ax, ax
int 0x16
call fmReset
mov bh, 0x20
mov bl, 0x01
call fmRegister
mov bh, 0x40
mov bl, 0x10
call fmRegister
mov bh, 0x60
mov bl, 0xF0
call fmRegister
mov bh, 0x80
mov bl, 0x77
call fmRegister
mov bh, 0xA0
mov bl, 0x98
call fmRegister
mov bh, 0x23
mov bl, 0x01
call fmRegister
mov bh, 0x43
mov bl, 0x00
call fmRegister
mov bh, 0x63
mov bl, 0xF0
call fmRegister
mov bh, 0x83
mov bl, 0x77
call fmRegister
mov bh, 0xB0
mov bl, 0x31
call fmRegister
xor ax, ax
int 0x16
xor ax, ax
int 0x21
pAddress dw 0x0330
pData dw 0x0331
fmReset:
push bx
push cx
xor bx, bx
mov cx, 0xF6
fmResetLoop:
call fmRegister
inc bh
loop fmResetLoop
pop cx
pop bx
ret
;--------------------------
; bh = register, bl = value
;--------------------------
fmRegister:
push ax
push cx
push dx
mov dx, pAddress
mov al, bh
out dx, al
mov cx, 6
fmRegisterLoop1:
in al, dx
loop fmRegisterLoop1
mov dx, pData
mov al, bl
out dx, al
mov dx, pAddress
mov cx, 35
fmRegisterLoop2:
in al, dx
loop fmRegisterLoop2
pop dx
pop cx
pop ax
ret
(I use NASM)
Best Regards
/ Christopher