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playwav.asm
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playwav.asm
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; ****************************************************************************
; PLAYWAV.ASM - ICH AC97 .wav player for DOS. PLAYWAV.COM
; ----------------------------------------------------------------------------
; Last Update: 13/05/2024
; ----------------------------------------------------------------------------
; Beginning: 17/02/2017
; ----------------------------------------------------------------------------
; Assembler: NASM version 2.15
; nasm playwav.asm -l playwav.lst -o PLAYWAV.COM
; ----------------------------------------------------------------------------
; Derived from '.wav file player for DOS' Jeff Leyda, Sep 02, 2002
; ****************************************************************************
; Modidified from 'PLAYER.COM' for VIA VT8233 wav player source code by
; (PLAYER.ASM) by Erdogan Tan (07/11/2016 - 08/12/2016)
[BITS 16]
[ORG 100h]
%include 'ac97.inc' ; 17/02/2017
_STARTUP:
; memory allocation
call setFree ; deallocate unused DOS mem
; 17/02/2017
; Clear BSS (uninitialized data) area
xor ax, ax ; 0
mov cx, (EOF - bss_start)/2
mov di, bss_start
rep stosw
; allocate 256 bytes of data for DCM_OUT Buffer Descriptor List. (BDL)
mov ax, BDL_SIZE / 16
call memAlloc
mov [BDL_BUFFER], ax ; segment
; allocate 2 buffers, 64k each for now.
mov ax, BUFFERSIZE / 16 ; 64k for .WAV file
call memAlloc
mov [WAV_BUFFER1], ax ; segment
mov ax, BUFFERSIZE / 16
call memAlloc
mov [WAV_BUFFER2], ax
; Detect/reset AC97
;
call pciFindDevice
jnc short _1
; couldn't find the audio device!
push cs
pop ds
mov dx, noDevMsg
mov ah, 9
int 21h
jmp exit
; 17/02/2017
noDevMsg db "Error: Unable to find intel ICH based audio device!",CR,LF,"$"
_1:
; eax = BUS/DEV/FN
; 00000000BBBBBBBBDDDDDFFF00000000
; edx = DEV/VENDOR
; DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV
mov [bus_dev_fn], eax
mov [dev_vendor], edx
; get ICH base address regs for mixer and bus master
mov al, NAMBAR_REG
call pciRegRead16 ; read PCI registers 10-11
and dx, IO_ADDR_MASK ; mask off BIT0
mov [NAMBAR], dx ; save audio mixer base addy
mov al, NABMBAR_REG
call pciRegRead16
and dx, IO_ADDR_MASK
mov [NABMBAR], dx ; save bus master base addy
; init controller
; 17/02/2017
mov al, PCI_CMD_REG ; command register (04h)
call pciRegRead16 ; pciRegRead8
; eax = BUS/DEV/FN/REG
; dx = PCI Command Register Content ; 17/02/2017
; 00000000CCCCCCCC
mov [stats_cmd], dx
mov al, PCI_IO_BASE ; IO base address register (10h)
call pciRegRead32
and dx, 0FFC0h ; IO_ADDR_MASK (0FFFE) ?
mov [ac97_io_base], dx
mov al, AC97_INT_LINE ; Interrupt line register (3Ch)
call pciRegRead8 ; 17/02/2017
mov [ac97_int_ln_reg], dl
; 28/11/2016
mov bx, 1
xor dh, dh ; 17/02/2017
mov cx, dx
shl bx, cl
;not bx
in al, 0A1h ; irq 8-15
mov ah, al
in al, 21h ; irq 0-7
;and ax, bx ; unmask
btr ax, dx ; unmask
out 21h, al ; enable interrupt (if irq <= 7)
mov al, ah
out 0A1h, al ; enable interrupt (if irq > 7)
;not bx
mov dx, 4D1h ;8259 ELCR1
in al, dx
mov ah, al
mov dx, 4D0h
in al, dx
;or ax, bx
bts ax, cx
mov dx, 4D0h
out dx, al ;set level-triggered mode
mov al, ah
mov dx, 4D1h
out dx, al ;set level-triggered mode
; 24/11/2016 - Erdogan Tan
mov bx, cx
;mov bx, dx
mov bl, [bx+irq_int]
shl bx, 2 ; * 4
; set up interrupt vector
; 30/11/2016
push es
xor ax, ax
mov es, ax
mov word [es:bx], ac97_int_handler
mov ax, cs
mov [es:bx+2], ax
pop es
call write_ac97_dev_info
; check the command line for a file to play
;push ds
call processCmdline ; get the filename
; open the file
mov al, OPEN ; open existing file
call openFile ; no error? ok.
;pop ds
jnc short _gsr
; file not found!
;push cs
;pop ds
mov dx, noFileErrMsg
mov ah, 9
int 21h
jmp exit
noFileErrMsg db "Error: file not found.",CR,LF,"$"
_gsr:
call getSampleRate ; read the sample rate
; pass it onto codec.
jc short exit ; 19/11/2016 - nothing to do
mov [sample_rate], ax
; 19/11/2016
mov [stmo], cl
mov [bps], dl
; 17/02/2017
mov byte [fbs_shift], 0 ; 0 = stereo and 16 bit
dec cl
jnz short _gsr_1 ; stereo
inc byte [fbs_shift] ; 1 = mono or 8 bit
_gsr_1:
cmp dl, 8
ja short _gsr_2 ; 16 bit samples
inc byte [fbs_shift] ; 2 = mono and 8 bit
_gsr_2:
call write_sample_rate
; 17/02/2017
mov dx, [stats_cmd]
or dl, IO_ENA+BM_ENA ; enable IO and bus master
call pciRegWrite16 ; pciRegWrite8
; setup the Codec (actually mixer registers)
call codecConfig ; unmute codec, set rates.
; 13/05/2024
; 11/11/2023
jc short init_err
;
; position file pointer to start in actual wav data
; MUCH improvement should really be done here to check if sample size is
; supported, make sure there are 2 channels, etc.
;
mov ah, 42h
mov al, 0 ; from start of file
mov bx, [filehandle]
xor cx, cx
mov dx, 44 ; jump past .wav/riff header
int 21h
; play the .wav file. Most of the good stuff is in here.
call playWav
; close the .wav file and exit.
close_exit: ; 13/05/2024
call closeFile
exit:
mov ax, 4c00h
int 21h
here:
jmp short here
; 13/05/2024
init_err:
mov dx, msg_init_err
; 13/05/2024
vra_err: ; 12/11/2023
;mov dx, msg_no_vra
mov ah, 9
int 21h
jmp short close_exit
; MEMALLOC.ASM
;-- SETFREE: Release memory not used ----------------
;-- Input : ES = address of PSP
;-- Output : none
;-- Register : AX, BX, CL and FLAGS are changed
;-- Info : Since the stack-segment is always the last segment in an
; EXE-file, ES:0000 points to the beginning and SS:SP
; to the end of the program in memory. Through this the
; length of the program can be calculated
; call this routine once at the beginning of the program to free up memory
; assigned to it by DOS.
setFree:
mov bx, 65536/16 ; 4K paragraphs ; 17/02/2017 (Erdogan Tan)
mov ah, 4ah ;pass new length to DOS
int 21h
retn ; back to caller
; new size (allocated memory) = 64KB
memAlloc:
; input: AX = # of paragraphs required
; output: AX = segment of block to use
push bx
mov bx, ax
mov ah, 48h
int 21h
pop bx
retn
; CMDLINE.ASM
; parse the command line
; entry: none
; exit: DS:DX to the 1st supplied item on the command line
processCmdline:
push bx
push si
;mov ah, 51h
;int 21h
;mov ds, bx
mov si, 80h
movzx bx, byte [si]
add si, bx
inc si
mov byte [si], NULL ; zero terminate
mov si, 81h
cmdlineloop:
lodsb
cmp al, NULL ; found end of line?
je short exitpc
cmp al, ' ' ; found a space?
je short cmdlineloop
; must be the filename here.
exitpc:
dec si ; point to start of filename
mov dx, si
pop si
pop bx
retn
; FILE.ASM
;open or create file
;
;input: ds:dx-->filename (asciiz)
; al=file Mode (create or open)
;output: none cs:[filehandle] filled
;
openFile:
push ax
push cx
mov ah, 3bh ; start with a mode
add ah, al ; add in create or open mode
xor cx, cx
int 21h
jc short _of1
;mov [cs:filehandle], ax
mov [filehandle], ax
_of1:
pop cx
pop ax
retn
; close the currently open file
; input: none, uses cs:[filehandle]
closeFile:
push ax
push bx
cmp word [filehandle], -1
jz short _cf1
mov bx, [filehandle]
mov ax,3e00h
int 21h ;close file
_cf1:
pop bx
pop ax
retn
getSampleRate:
; 08/12/2016
; reads the sample rate from the .wav file.
; entry: none - assumes file is already open
; 19/11/2016 - Erdogan Tan
; exit: ax = sample rate (11025, 22050, 44100, 48000)
; cx = number of channels (mono=1, stereo=2)
; dx = bits per sample (8, 16)
push bx
mov ah, 42h
mov al, 0 ; from start of file
mov bx, [filehandle]
xor cx, cx
mov dx, 08h ; "WAVE"
int 21h
mov dx, smpRBuff
mov cx, 28 ; 28 bytes
mov ah, 3fh
int 21h
cmp word [smpRBuff], 'WA'
jne short gsr_stc
cmp word [smpRBuff+2], 'VE'
jne short gsr_stc
cmp word [smpRBuff+12], 1 ; Offset 20, must be 1 (= PCM)
jne short gsr_stc
mov cx, [smpRBuff+14] ; return num of channels in CX
mov ax, [smpRBuff+16] ; return sample rate in AX
mov dx, [smpRBuff+26] ; return bits per sample value in DX
gsr_retn:
pop bx
retn
gsr_stc:
stc
jmp short gsr_retn
%include 'ac97.asm' ; 29/11/2016 (AC97 codec configuration)
%include 'ich_wav.asm' ; 17/02/2017 (ICH AC97 wav playing functions)
; UTILS.ASM
;----------------------------------------------------------------------------
; delay1_4ms - Delay for 1/4 millisecond.
; 1mS = 1000us
; Entry:
; None
; Exit:
; None
;
; Modified:
; None
;
PORTB EQU 061h
REFRESH_STATUS EQU 010h ; Refresh signal status
delay1_4ms:
push ax
push cx
mov cx, 16 ; close enough.
in al,PORTB
and al,REFRESH_STATUS
mov ah,al ; Start toggle state
or cx, cx
jz short _d4ms1
inc cx ; Throwaway first toggle
_d4ms1:
in al,PORTB ; Read system control port
and al,REFRESH_STATUS ; Refresh toggles 15.085 microseconds
cmp ah,al
je short _d4ms1 ; Wait for state change
mov ah,al ; Update with new state
dec cx
jnz short _d4ms1
pop cx
pop ax
retn
; 13/11/2016 - Erdogan Tan
write_ac97_dev_info:
; BUS/DEV/FN
; 00000000BBBBBBBBDDDDDFFF00000000
; DEV/VENDOR
; DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV
xor bh, bh
mov esi, [dev_vendor]
mov ax, si
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgVendorId+3], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgVendorId+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgVendorId+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgVendorId], al
shr esi, 16
mov ax, si
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgDevId+3], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgDevId+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgDevId+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgDevId], al
mov esi, [bus_dev_fn]
shr esi, 8
mov ax, si
mov bl, al
mov dl, bl
and bl, 7 ; bit 0,1,2
mov al, [bx+hex_chars]
mov [msgFncNo+1], al
mov bl, dl
shr bl, 3
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgDevNo+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgDevNo], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgBusNo+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgBusNo], al
mov ax, [ac97_io_base]
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgIOBaseAddr+3], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgIOBaseAddr+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgIOBaseAddr+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgIOBaseAddr], al
; 24/11/2016
xor ah, ah
mov al, [ac97_int_ln_reg]
mov cl, 10
div cl
add [msgIRQ], ax
and al, al
jnz short _pmi
mov al, [msgIRQ+1]
mov ah, ' '
mov [msgIRQ], ax
_pmi:
mov dx, msgAC97Info
mov ah, 9
int 21h
retn
write_sample_rate:
; ax = sample rate (hertz)
xor dx, dx
mov cx, 10
div cx
add [msgHertz+4], dl
sub dx, dx
div cx
add [msgHertz+3], dl
sub dx, dx
div cx
add [msgHertz+2], dl
sub dx, dx
div cx
add [msgHertz+1], dl
add [msgHertz], al
mov dx, msgSampleRate
mov ah, 9
int 21h
; 19/11/2016
mov dx, msg16Bits
cmp byte [bps], 16
je short wsr_1
mov dx, msg8Bits
wsr_1:
mov ah, 9
int 21h
mov dx, msgMono
cmp byte [stmo], 1
je short wsr_2
mov dx, msgStereo
wsr_2:
mov ah, 9
int 21h
retn
;detect_codec:
; ; 13/11/2016 - Erdogan Tan (Ref: KolibriOS, codec.inc)
; mov eax, 7Ch
; call codec_read
; shl eax, 16
; mov [codec_id], eax
;
; mov eax, 7Eh
; call codec_read
; or eax, [codec_id]
; mov [codec_chip_id], eax
; and eax, 0FFFFFF00h
;
; mov edi, codecs
;_dcb:
; mov ebx, [di]
; test ebx, ebx
; jz short _dco_unknown
;
; cmp eax, ebx
; jne short _dco_next
; mov ax, [di+4]
; mov [codec_vendor_ids], ax
; movzx esi, ax
; call print_msg
;
; mov ax, [di+6]
; call detect_chip
; retn
;
;_dco_next:
; add di, 8
; jmp short _dcb
;
;_dco_unknown:
; mov word [codec_vendor_ids], ac_unknown
; mov word [codec_chip_ids], chip_unknown
; mov esi, chip_unknown
; call print_msg
; mov eax, [codec_chip_id]
; call dword2str
; call print_msg
; retn
;detect_chip:
; ; 13/11/2016 - Erdogan Tan (Ref: KolibriOS, codec.inc)
; mov di, ax ; chip_tab
; mov eax, [codec_chip_id]
; and ax, 0FFh
;_dch1:
; mov bx, [di]
; cmp bx, 0FFh
; je short _dch_unknown
;
; cmp ax, bx
; jne short _dch_next
; mov ax, [di+2]
; mov [codec_chip_ids], ax
; mov si, ax
; call print_msg
; retn
;_dch_next:
; add di, 4
; jmp short _dch1
;
;_dch_unknown:
; mov word [codec_chip_ids], chip_unknown
; mov si, chip_unknown
; call print_msg
; mov eax, [codec_chip_id]
; call dword2str
; call print_msg
; retn
ac97_int_handler:
; 17/02/2016
push ax
push dx
push cx
push bx
push si
push di
cmp byte [inside], 1
jnb short _busy
mov byte [inside], 1
mov dx, [NABMBAR]
add dx, PO_SR_REG ; set pointer to Status reg
in al, dx
mov [irq_status], al
test al, BCIS ; Buffer Completion Interrupt Status (Bit 3)
jz short _ih_3
; 28/11/2016 - Erdogan Tan
call tuneLoop
_ih0:
mov byte [inside], 0
_busy:
mov al, 20h
test byte [ac97_int_ln_reg], 8
jz short _ih_1
out 0A0h, al ; 20h ; EOI
_ih_1:
out 20h, al ; 20h ; EOI
_ih_2:
pop di
pop si
pop bx
pop cx
pop dx
pop ax
iret
_ih_3:
; 17/02/2017
out dx, al ; clear interrupt event (by writing 1 to same bits)
jmp short _ih0
print_msg:
; 13/11/2016 - Erdogan Tan
; esi = ASCIIZ text address
;
mov bx, 7h
mov ah, 0Eh
pm_next_char:
lodsb
and al, al
jz short pm_retn
int 10h
jmp short pm_next_char
pm_retn:
retn
dword2str:
; 13/11/2016 - Erdogan Tan
; eax = dword value
;
call dwordtohex
mov [dword_str], edx
mov [dword_str+4], eax
mov si, dword_str
retn
; trdos386.s (unix386.s) - 10/05/2015
; Convert binary number to hexadecimal string
bytetohex:
; INPUT ->
; AL = byte (binary number)
; OUTPUT ->
; AX = hexadecimal string
;
push bx
xor bh, bh
mov bl, al
shr bl, 4
mov bl, [bx+hex_chars]
xchg bl, al
and bl, 0Fh
mov ah, [bx+hex_chars]
pop bx
retn
wordtohex:
; INPUT ->
; AX = word (binary number)
; OUTPUT ->
; EAX = hexadecimal string
;
push bx
xor bh, bh
xchg ah, al
push ax
mov bl, ah
shr bl, 4
mov al, [bx+hex_chars]
mov bl, ah
and bl, 0Fh
mov ah, [bx+hex_chars]
shl eax, 16
pop ax
pop bx
jmp short bytetohex
dwordtohex:
; INPUT ->
; EAX = dword (binary number)
; OUTPUT ->
; EDX:EAX = hexadecimal string
;
push eax
shr eax, 16
call wordtohex
mov edx, eax
pop eax
call wordtohex
retn
_DATA:
; 24/11/2016
; IRQ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
irq_int db 08h,09h,0Ah,0Bh,0Ch,0Dh,0Eh,0Fh,70h,71h,72h,73h,74h,75h,76h,77h
; 17/02/2017
; Valid ICH device IDs
valid_ids:
dd (ICH_DID << 16) + INTEL_VID ; 8086h:2415h
dd (ICH0_DID << 16) + INTEL_VID ; 8086h:2425h
dd (ICH2_DID << 16) + INTEL_VID ; 8086h:2445h
dd (ICH3_DID << 16) + INTEL_VID ; 8086h:2485h
dd (ICH4_DID << 16) + INTEL_VID ; 8086h:24C5h
dd (ICH5_DID << 16) + INTEL_VID ; 8086h:24D5h
dd (ICH6_DID << 16) + INTEL_VID ; 8086h:266Eh
dd (ESB6300_DID << 16) + INTEL_VID ; 8086h:25A6h
dd (ESB631X_DID << 16) + INTEL_VID ; 8086h:2698h
dd (ICH7_DID << 16) + INTEL_VID ; 8086h:27DEh
; 03/11/2023 - Erdogan Tan
dd (MX82440_DID << 16) + INTEL_VID ; 8086h:7195h
dd (SI7012_DID << 16) + SIS_VID ; 1039h:7012h
dd (NFORCE_DID << 16) + NVIDIA_VID ; 10DEh:01B1h
dd (NFORCE2_DID << 16) + NVIDIA_VID ; 10DEh:006Ah
dd (AMD8111_DID << 16) + AMD_VID ; 1022h:746Dh
dd (AMD768_DID << 16) + AMD_VID ; 1022h:7445h
dd (CK804_DID << 16) + NVIDIA_VID ; 10DEh:0059h
dd (MCP04_DID << 16) + NVIDIA_VID ; 10DEh:003Ah
dd (CK8_DID << 16) + NVIDIA_VID ; 1022h:008Ah
dd (NFORCE3_DID << 16) + NVIDIA_VID ; 10DEh:00DAh
dd (CK8S_DID << 16) + NVIDIA_VID ; 10DEh:00EAh
valid_id_count: equ ($ - valid_ids)>>2 ; 05/11/2023
; 13/11/2016
hex_chars db "0123456789ABCDEF", 0
msgAC97Info db "AC97 Audio Controller & Codec Info", 0Dh, 0Ah
db "Vendor ID: "
msgVendorId db "0000h Device ID: "
msgDevId db "0000h", 0Dh, 0Ah
db "Bus: "
msgBusNo db "00h Device: "
msgDevNo db "00h Function: "
msgFncNo db "00h"
db 0Dh, 0Ah
db "I/O Base Address: "
msgIOBaseAddr db "0000h IRQ: "
msgIRQ dw 3030h
db 0Dh, 0Ah, "$"
msgSampleRate db "Sample Rate: "
msgHertz db "00000 Hz ", "$"
msg8Bits db "8 bits ", "$"
msgMono db "Mono", 0Dh, 0Ah, "$"
msg16Bits db "16 bits ", "$"
msgStereo db "Stereo", 0Dh, 0Ah, "$"
;; 13/11/2016 - Erdogan Tan (Ref: KolibriOS, codec.inc)
;codec_id dd 0
;codec_chip_id dd 0
;codec_vendor_ids dw 0
;codec_chip_ids dw 0
dword_str dd 30303030h, 30303030h
db 'h', 0Dh, 0Ah, 0
;ac_unknown db 'unknown manufacturer',13,10,0
;ac_Realtek db 'Realtek Semiconductor',13,10,0
;ac_Analog db 'Analog Devices',13,10,0
;ac_CMedia db 'C-Media Electronics',13,10,0
;ac_Cirrus db 'Cirrus Logic',13,10,0
;ac_Wolfson db 'Wolfson Microelectronics',13,10,0
;ac_VIA db 'VIA Technologies',13,10,0
;ac_SigmaTel db 'SigmaTel',13,10,0
;ac_eMicro db 'eMicro',13,10,0
;
;chip_unknown db 'unknown codec id ', 0
;CHIP_REALTEK equ 414C4700h
;CHIP_CMEDIA equ 434D4900h
;CHIP_VIA equ 56494100h
;codecs dd CHIP_CMEDIA
; dw ac_CMedia, chips_CMedia
; dd CHIP_REALTEK
; dw ac_Realtek, chips_Realtek
; dd CHIP_VIA
; dw ac_VIA, chips_VIA
; dd 0
;chips_Realtek dw 10h, chip_ALC201a
; dw 20h, chip_ALC650
; dw 21h, chip_ALC650D
; dw 22h, chip_ALC650E
; dw 23h, chip_ALC650F
; dw 60h, chip_ALC655
; dw 80h, chip_ALC658
; dw 81h, chip_ALC658D
; dw 90h, chip_ALC850
; dw 0FFh
;chips_CMedia dw 41h, chip_CM9738
; dw 61h, chip_CM9739
; dw 69h, chip_CM9780
; dw 78h, chip_CM9761
; dw 82h, chip_CM9761
; dw 83h, chip_CM9761
; dw 0FFh
;chips_VIA dw 61h, chip_VIA1612A
; dw 0FFh
;Realtek
;chip_ALC201a db 'ALC201a',0dh,0ah,00h
;chip_ALC650 db 'ALC650 ',0dh,0ah,00h
;chip_ALC650D db 'ALC650D',0dh,0ah,00h
;chip_ALC650E db 'ALC650E',0dh,0ah,00h
;chip_ALC650F db 'ALC650F',0dh,0ah,00h
;chip_ALC655 db 'ALC655 ',0dh,0ah,00h
;chip_ALC658 db 'ALC658 ',0dh,0ah,00h
;chip_ALC658D db 'ALC658D',0dh,0ah,00h
;chip_ALC850 db 'ALC850 ',0dh,0ah,00h
;CMedia
;chip_CM9738 db 'CMI9738', 0dh,0ah,0
;chip_CM9739 db 'CMI9739', 0dh,0ah,0
;chip_CM9780 db 'CMI9780', 0dh,0ah,0
;chip_CM9761 db 'CMI9761', 0dh,0ah,0
;VIA
;chip_VIA1612A db 'VIA1612A',13,10,0
; 11/11/2023
msg_init_err:
db CR, LF
db "AC97 Controller/Codec initialization error !"
db CR, LF, "$"
; 12/11/2023
msg_no_vra:
db CR, LF
db "No VRA support ! Only 48 kHZ sample rate supported !"
db CR, LF, "$"
; 17/02/2017
bss_start:
ABSOLUTE bss_start
alignb 2
; 28/11/2016
smpRBuff: resw 14 ; 19/11/2016 - Erdogan Tan
filehandle: resw 1
flags: resb 1
irq_status: resb 1
inside: resb 1
tLoop: resb 1
; 17/02/2017
; NAMBAR: Native Audio Mixer Base Address Register
; (ICH, Audio D31:F5, PCI Config Space) Address offset: 10h-13h
; NABMBAR: Native Audio Bus Mastering Base Address register
; (ICH, Audio D31:F5, PCI Config Space) Address offset: 14h-17h
NAMBAR: resw 1 ; BAR for mixer
NABMBAR resw 1 ; BAR for bus master regs
; 256 byte buffer for descriptor list
BDL_BUFFER: resw 1 ; segment of our 256byte BDL buffer
WAV_BUFFER1: resw 1 ; segment of our WAV storage
; 64k buffers for wav file storage
WAV_BUFFER2: resw 1 ; segment of 2nd wav buffer
tBuff: resb 1
ac97_int_ln_reg: resb 1
; 12/11/2016 - Erdogan Tan
bus_dev_fn: resd 1
dev_vendor: resd 1
stats_cmd: resw 1 ; 17/02/2017
ac97_io_base: resw 1
sample_rate: resw 1
; 19/11/2016
stmo: resw 1
bps: resw 1
fbs_shift: resb 1
fbs_seg: resw 1
fbs_off: resw 1
; 32 kilo bytes for temporay buffer
; (for stereo-mono, 8bit/16bit corrections)