$Revision: 425 $
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; SB16.INC ;;
;; ;;
;; Sound Blaster 16 functions for MenuetOS ;;
;; ;;
;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;;
;; ;;
;; See file COPYING for details ;;
;; ;;
;; - 11.07.2002 8 bit stereo mode - Ville Turjanmaa ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
SB16_load_music equ 0xc0000000
SB16_play_music equ 0xc0000001
DMAPage equ 0x2A
Rate equ 44100
SB16Buffer equ 0x2A0000
;SB16_Status equ SB16Buffer+65536
iglobal
sound_data_format dd 0x1
sound_data_length dd 65536
sound_data_freq dd 44100
endg
sound_interface:
cmp eax,0 ; Load data
jne no_SB16_load_music
mov edi,[TASK_BASE]
add edi,TASKDATA.mem_start
add ebx,[edi]
call code_SB16_load_music
ret
no_SB16_load_music:
cmp eax,1 ; Play data
jne no_SB16_play_music
call code_SB16_play_music
ret
no_SB16_play_music:
cmp eax,2 ; Set data formats
jne no_SB16_data_format
cmp ebx,0 ; ebx=0 play format
jne no_sound_format
mov [sound_data_format],ecx ; 1=8b mono, 2=8b stereo
ret
no_sound_format:
cmp ebx,1 ; ebx=1 data length
jne no_sound_length
mov [sound_data_length],ecx ;
ret
no_sound_length:
cmp ebx,2 ; ebx=2 sound data frequency
jne no_sound_freq
mov [sound_data_freq],ecx
ret
no_sound_freq:
ret
no_SB16_data_format:
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
cmp eax, edi ; this is subfunction #55 ?
jne retFunc55 ; if no then return.
cmp byte [sound_flag],0
jne retFunc55
movzx eax, byte [countDelayNote]
or al, al ; player is busy ?
jnz retFunc55 ; return counter delay Note
; mov eax, [TASK_BASE]
; mov eax, [eax+0x10] ; address application im memory
; add eax, edx ; add offset Delay-Note string
; mov [memAdrNote], eax
mov [memAdrNote],edx
mov eax,[TASK_BASE]
mov eax,[eax+TASKDATA.pid]
mov [pidProcessNote],eax
xor eax, eax ; Ok! EAX = 0
retFunc55:
mov [esp+36], eax ; return value EAX for application
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ret
code_SB16_play_music:
cmp [sound_data_format],1
jne no_sound_8bm
call sb_play_8b_mono
ret
no_sound_8bm:
cmp [sound_data_format],2
jne no_sound_8bs
call sb_play_8b_stereo
ret
no_sound_8bs:
ret
Blaster_command:
push eax
push ecx
push edx
mov dx,word [sb16]
add dx,0xc
mov cx,1000
bcl1:
in al,dx
and al,128
jz bcl2
loop bcl1
bcl2:
mov al,[esp+8]
mov dx,[esp+0]
add dx,word [sb16]
out dx,al
pop edx
pop ecx
pop eax
ret
sb_play_8b_stereo:
pusha
call sb_set_dma
call sb_set_stereo
mov dx,0xc
mov al,0xa8
call Blaster_command
mov al,0x40
call Blaster_command
mov al,245
call Blaster_command
mov al,0x48
call Blaster_command
mov al,0xff
call Blaster_command
call Blaster_command
mov al,0x91
call Blaster_command
popa
ret
sb_set_stereo:
push eax
push edx
call sb_wait
mov dx,word [sb16]
add dx,0x4
mov al,0xe
out dx,al
inc dx
in al,dx
and al,253
or al,2 ; stereo
out dx,al
pop edx
pop eax
ret
code_SB16_load_music:
cmp byte [SB16_Status],1
je nol
mov edi,SB16Buffer
mov esi,ebx
mov ecx,65536/4
cld
rep movsd
nol: ret
iglobal
dma_table db 0x87,0x83,0x81,0x82
endg
;--------------------------------
; program dma
;--------------------------------
sb_set_dma:
pusha
mov eax,[sound_dma]
add eax,4
out 0xa,al
mov al,0
out 0xc,al
mov eax,[sound_dma]
add eax,0x48
out 0xb,al
mov edx,[sound_dma]
shl edx,1
mov al,0
out dx,al
mov al,0
out dx,al
mov edx,[sound_dma]
add edx,dma_table
movzx edx,byte [edx]
mov al,DMAPage
out dx,al
mov edx,[sound_dma]
shl edx,1
inc edx
mov eax,[sound_data_length]
dec eax
and eax,0xff
; mov al,(DataLength-1) and 0xff
out dx,al
mov eax,[sound_data_length]
dec eax
shr eax,8
; mov al,(DataLength-1) shr 8
out dx,al
mov eax,[sound_dma] ; DMA
out 0xa,al
popa
ret
sb_play_8b_mono:
call sb_set_dma
cmp byte [SB16_Status],1
jne contsb16
jmp retserve
contsb16:
mov dx,word [sb16]
add dx,4
mov ecx,[sound_dma]
mov ax,0x01
shl ax,cl
shl ax,8
add ax,0x81
out dx,ax
mov ax,0f280h ;enable irq5
out dx,ax
adr1_SB: mov dx,word [sb16]
add dx,0ch
in al,dx
and al,080h
jnz adr1_SB
call sb_set_stereo
mov al,0d1h
out dx,al
mov dx,word [sb16]
add dx,0ch
call sb_wait
mov al,40h ; Rate
out dx,al
call sb_wait
mov al,256-1000000/Rate
out dx,al
call sb_wait
mov al,14h ; Datalength
out dx,al
call sb_wait
mov eax,[sound_data_length]
dec eax
and eax,0xff
;mov al,(DataLength-1) and 0xff
out dx,al
call sb_wait
mov eax,[sound_data_length]
dec eax
shr eax,8
;mov al,(DataLength-1) shr 8
out dx,al
retserve:
ret
sb_wait: in al,dx ;wait
and al,080h
jnz sb_wait
ret
;****************************************
; END CODE SB16 by Minazzi Paolo
;***************************************