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playwav3.asm
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playwav3.asm
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; ****************************************************************************
; PLAYWAV.ASM - ICH AC97 .wav player for DOS. PLAYWAV.COM
; ----------------------------------------------------------------------------
; Last Update: 19/05/2024 (Previous: 08/05/2024)
; ----------------------------------------------------------------------------
; 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)
; AC97 interrupt version - 09/11/2023 - Erdogan Tan
; sample rate conversion version - 13/11/2023 - Erdogan Tan
[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
; 19/05/2024
and dl, 0FEh
mov [NAMBAR], dx ; save audio mixer base addr
mov al, NABMBAR_REG
call pciRegRead16
;and dx, IO_ADDR_MASK
; 19/05/2024
and dl, 0C0h
mov [NABMBAR], dx ; save bus master base addr
; 06/11/2023
;; 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
;
; 06/11/2023
;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
; 09/11/2023
; 05/11/2023
%if 1
; 28/11/2016
;mov bx, 1 ; 08/05/2024
xor dh, dh ; 17/02/2017
; 10/11/2023
;mov cx, dx
;shl bx, cl
; 04/11/2023
cli
;not bx
in al, 0A1h ; irq 8-15
mov ah, al
in al, 21h ; irq 0-7
; 04/11/2023
; save IRQ status
mov [IRQ_status], ax
;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
; 04/11/2023
;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
; 10/11/2023
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
; 04/11/2023
; save interrupt vector
mov ax, [es:bx]
mov [IRQ_vector], ax
mov ax, [es:bx+2]
mov [IRQ_vector+2], ax
mov word [es:bx], ac97_int_handler
mov ax, cs
mov [es:bx+2], ax
pop es
; 04/11/2023
sti
%endif
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
; 05/11/2023
_2:
call check4keyboardstop ; flush keyboard buffer
jc short _2 ; 07/11/2023
; 09/11/2023
;; 05/11/2023
;mov eax, [bus_dev_fn]
;mov al, PCI_CMD_REG
;call pciRegRead16 ; read PCI command register
;; 17/02/2017
;;mov dx, [stats_cmd]
;or dl, IO_ENA+BM_ENA ; enable IO and bus master
;call pciRegWrite16 ; pciRegWrite8
;; 06/11/2023
;;mov eax, [bus_dev_fn]
;;mov al, PCI_CMD_REG
;;call pciRegRead8 ; read PCI command register
;;or dl, IO_ENA+BM_ENA ; enable IO and bus master
;;call pciRegWrite8
; setup the Codec (actually mixer registers)
call codecConfig ; unmute codec, set rates.
; 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: ; 11/11/2023
call closeFile
exit:
mov ax, 4c00h
int 21h
here:
jmp short here
; 11/11/2023
init_err:
mov dx, msg_init_err
vra_err: ; 12/11/2023
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 'ac97_vra.asm' ; 19/11/2023 (AC97 codec configuration)
;%include 'ich_wav.asm' ; 17/02/2017 (ICH AC97 wav playing functions)
%include 'ich_wav3.asm' ; 13/11/2023 (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, [NAMBAR]
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgNamBar+3], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgNamBar+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgNamBar+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgNamBar], al
; 08/05/2024 (ebx->bx)
; 05/11/2023
mov ax, [NABMBAR]
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgNabmBar+3], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgNabmBar+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [bx+hex_chars]
mov [msgNabmBar+1], al
mov bl, dl
shr bl, 4
mov al, [bx+hex_chars]
mov [msgNabmBar], 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
; 19/05/2024
; 10/11/2023
; 09/11/2023
; 06/11/2023
%if 1
ac97_int_handler:
; 19/05/2024
; 16/05/2024 ('PLAYMOD3.ASM', 18/05/2024, Erdogan Tan)
; 11/11/2023
; 10/11/2023
; 17/02/2016
push ax ; + ; 16/05/2024
;push eax ; * ; 11/11/2023
push dx ; **
; 05/11/2023
;push cx
;push bx
;push si
;push di
; 10/11/2023
; EOI at first
mov al, 20h
test byte [ac97_int_ln_reg], 8
jz short _ih_0
out 0A0h, al ; 20h ; EOI
_ih_0:
out 20h, al ; 20h ; EOI
; 16/05/2024
; mov dx, GLOB_STS_REG
; add dx, [NABMBAR]
; in eax, dx
;
; inc eax ; 0FFFFFFFFh
; jz short _ih_3
; dec eax ; 0
; ;jz short _ih_3
;_ih_3:
; ; 16/05/2024
; push eax ; ***
; 16/05/2024
; 24/11/2023 (TRDOS386 'audio.s')
mov dx, [NABMBAR]
add dx, PO_SR_REG
in ax, dx
test al, BCIS ; bit 3, 8
jz short _ih_2
; 19/05/2024
; 15/05/2024
;cmp byte [tLoop], 1
;jb short _ih_2
_ih_1:
; 19/05/2024
push ax ; ****
; 10/11/2023
; 28/11/2016 - Erdogan Tan
call tuneLoop
; 19/05/2024
pop ax ; ****
; 16/05/2024
_ih_2:
;mov ax, 1Ch ; FIFOE(=16)+BCIS(=8)+LVBCI(=4)
mov dx, [NABMBAR]
add dx, PO_SR_REG
out dx, ax
; ; 16/05/2024
; pop eax ; ***
;
; or eax, eax
; jz short _ih_4
;
; mov dx, GLOB_STS_REG
; add dx, [NABMBAR]
; out dx, eax
; 16/05/2024
_ih_4:
; 10/11/2023
;mov al, 20h
;test byte [ac97_int_ln_reg], 8
;jz short _ih_5
;out 0A0h, al ; 20h ; EOI
;_ih_5:
;out 20h, al ; 20h ; EOI
;_ih_6:
;pop di
;pop si
;pop bx
;pop cx
pop dx ; **
;pop eax ; * ; 11/11/2023
pop ax ; + ; 16/05/2024
iret
%else
ac97_int_handler:
; 11/11/2023
; 10/11/2023
; 17/02/2016
push eax ; 11/11/2023
push dx
; 05/11/2023
;push cx
;push bx
;push si
;push di
; 10/11/2023
; EOI at first
mov al, 20h
test byte [ac97_int_ln_reg], 8
jz short _ih_0
out 0A0h, al ; 20h ; EOI
_ih_0:
out 20h, al ; 20h ; EOI
; 11/11/2023
; 09/11/2023
mov dx, GLOB_STS_REG
add dx, [NABMBAR]
in eax, dx
; 09/11/2023,
cmp eax, 0FFFFFFFFh ; -1
je short _ih_2
test al, 40h ; PCM Out Interrupt
jnz short _ih_1
test eax, eax
jz short _ih_2
;mov dx, GLOB_STS_REG
;add dx, [NABMBAR]
out dx, eax
jmp short _ih_2
; .....
;mov al, 1
; 10/11/2023
;mov [tloop], al ; 1
;cmp [inside], al ; 1
;jnb short _ih_3 ; busy
;mov [inside], al ; 1
;
;; 09/11/2023
;mov dx, [NABMBAR]
;add dx, PO_SR_REG ; set pointer to Status reg
;in al, dx
;; 10/11/2023
;;;out dx, eax
;;out dx, al ; clear interrupt event
; ; (by writing 1 to same bits)
;
;;mov [pcm_irq_status], al ; 05/11/2023
;test al, BCIS ; Buffer Completion Interrupt Status (Bit 3)
;jz short _ih_2
; .....
_ih_1:
; 11/11/2023
push eax
;mov ax, 1Ch ; FIFOE(=16)+BCIS(=8)+LVBCI(=4)
;mov dx, PO_SR_REG
;add dx, [NABMBAR]
;out dx, ax
; 10/11/2023
; 28/11/2016 - Erdogan Tan
call tuneLoop
; 11/11/2023
pop eax
mov dx, GLOB_STS_REG
add dx, [NABMBAR]
out dx, eax
_ih_2:
; 11/11/2023
mov dx, [NABMBAR]
add dx, PO_SR_REG ; set pointer to Status reg
mov ax, 1Ch
out dx, ax
; ; 10/11/2023
; mov al, 20h
; test byte [ac97_int_ln_reg], 8
; jz short _ih_3
; out 0A0h, al ; 20h ; EOI
;_ih_3:
; out 20h, al ; 20h ; EOI
;_ih_4:
;mov byte [inside], 0
;pop di
;pop si
;pop bx
;pop cx
pop dx
pop eax ; 11/11/2023
iret
%endif
; 10/11/2023
; 09/11/2023
; 06/11/2023
%if 0
ac97_int_handler:
; 10/11/2023
; 17/02/2016
push ax ; 09/11/2023
push dx
; 05/11/2023
;push cx
;push bx
;push si
;push di
; 10/11/2023
; EOI at first
mov al, 20h
test byte [ac97_int_ln_reg], 8
jz short _ih_0
out 0A0h, al ; 20h ; EOI
_ih_0:
out 20h, al ; 20h ; EOI
mov al, 1
; 10/11/2023
;mov [tloop], al ; 1
cmp [inside], al ; 1
jnb short _ih_3 ; busy
mov [inside], al ; 1
; 09/11/2023