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cgaplay.asm
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; ****************************************************************************
; cgaplay.asm - Retro DOS (MSDOS/PCDOS) WAV PLAYER - Video Mode 13h
; ----------------------------------------------------------------------------
; CGAPLAY.COM ! AC'97 (ICH) .WAV PLAYER program by Erdogan TAN
;
; 01/01/2025 - play music from multiple wav files -
;
; [ Last Modification: 04/02/2025 ]
;
; Modified from CGAPLAY1.PRG .wav player program by Erdogan Tan, 31/12/2024
; AC97PLAY.COM, 18/12/2024
;
; ****************************************************************************
; nasm cgaplay.asm -l cgaplay.lst -o CGAPLAY.COM -Z error.txt
; 31/12/2024
; cgaplay1.s (int 31h modifications on cgaplay.s) -TRDOS386-PRG-
; 18/12/2024
; ac97play.asm : TUNELOOP version (playing without AC97 interrupt) -DOS-COM-
; vgaplay.s (26/12/2024) - play music from multiple wav files -
; dplayvga.s (25/12/2024) - play music from single wav file -
; ac97play.s (18/12/2024) - play music from multiple wav files -
; 07/12/2024 - playwav9.s - interrupt (srb) + tuneloop version
; ------------------------------------------------------------
; INTERRUPT (SRB) + TUNELOOP version ; 24/11/2024 (PLAYWAV9.ASM)
; (running in DOSBOX, VIRTUALBOX, QEMU is ok)
; Signal Response Byte = message/signal to user about an event/interrupt
; as requested (TuneLoop procedure continuously checks this SRB)
; (TRDOS 386 v2 feature is used here as very simple interrupt handler output)
; ------------------------------------------------------------
; 01/01/2025
%macro sys_msg 2
mov si, %1 ; message
mov bl, %2 ; text color
xor bh, bh ; video page 0
mov ah, 0Eh
call p_msg
%endmacro
; ------------------------------------------------------------
; player internal variables and other equates.
;BUFFERSIZE equ 64 * 1024 ; 64k file buffer size.
; 17/11/2024
BUFFERSIZE equ 65520
ENDOFFILE equ 1 ; flag for knowing end of file
; ------------------------------------------------------------
[BITS 16] ; 16-bit intructions
[ORG 100h]
; 01/01/2025
START_CODE:
; 30/05/2024
; Prints the Credits Text.
sys_msg Credits, 0Bh
; 01/01/2025
; (setFree is required before memAlloc)
; 30/05/2024
call setFree ; deallocate unused DOS mem
; 17/02/2017
; Clear BSS (uninitialized data) area
xor ax, ax ; 0
mov cx, (bss_end - bss_start)/2
mov di, bss_start
rep stosw
; -------------------------------------------------------------
; 21/12/2024
; Detect (& Enable) AC'97 Audio Device
call DetectAC97
jnc short ac97_hardware_ready
; 30/11/2024
; 30/05/2024
_dev_not_ready:
; couldn't find the audio device!
sys_msg noDevMsg, 0Fh
jmp Exit
ac97_hardware_ready:
call write_audio_dev_info
; -------------------------------------------------------------
; 30/05/2024
allocate_memory:
; 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
; -------------------------------------------------------------
; 01/01/2025
; set VGA/CGA mode (320*200 pixels, 256 colors)
mov ax, 13h
int 10h
; -------------------------------------------------------------
mode_13h_set_ok:
; 01/01/2025
;mov word [graphstart], (11*8*320)+(4*320)
; -------------------------------------------------------------
; 01/01/2025
Player_ParseParameters:
; 28/11/2024
mov si, 81h
mov [PSP_CurrentOffset], si
cmp byte [si], 0Dh ; "CR": No command line parameters
ja short Player_ParseNextParameter ; 01/01/2025
jmp pmsg_usage
; 30/12/2024
; 29/11/2024
check_p_command:
cmp byte [command], 'P'
je short Player_ParsePreviousParameter
mov si, [PSP_CurrentOffset]
cmp byte [si], 0Dh
ja short Player_ParseNextParameter
jmp_Player_Quit:
jmp Player_Quit
Player_ParsePreviousParameter:
; 29/11/2024
;mov byte [command], 0
mov si, [PSP_CurrentOffset]
cmp si, 81h
je short Player_ParseNextParameter
;; Search for previous space character
dec si
mov cx, 2
PSPParsePrev_Search:
dec si
mov al, [si]
cmp al, 20h
jne short PSPParsePrev_Search
cmp si, 81h
jna PSPParsePrev_Copy
loop PSPParsePrev_Search
PSPParsePrev_Copy:
mov [PSP_CurrentOffset], si
Player_ParseNextParameter:
; 29/11/2024
call GetFileName
jcxz jmp_Player_Quit
; 01/01/2025
; 28/11/2024
mov dx, wav_file_name
; 30/12/2024
; open existing file
call openFile ; no error? ok.
jnc getwavparms ; 14/11/2024
; 29/11/2024
cmp byte [filecount], 0
ja short check_p_command
; 25/12/2024
; 21/12/2024
call set_text_mode
; file not found!
; 01/01/2025
; 30/11/2024
sys_msg noFileErrMsg, 0Ch
jmp Exit
_exit_:
jmp terminate
; -------------------------------------------------------------
; 29/11/2024
; 30/05/2024
GetFileName:
mov di, wav_file_name
mov si, [PSP_CurrentOffset]
xor cx, cx ; 0
ScanName:
lodsb
;test al, al
;jz short a_4
; 29/11/2024
cmp al, 0Dh
jna short a_4
cmp al, 20h
je short ScanName ; scan start of name.
stosb
mov ah, 0FFh
;;;
; 14/11/2024
; (max. path length = 64 bytes for MSDOS ?) (*)
;xor cx, cx ; 0
;;;
a_0:
inc ah
a_1:
;;;
; 14/11/2024
inc cx
;;;
lodsb
stosb
cmp al, '.'
je short a_0
; 29/11/2024
cmp al, 20h
;and al, al
;jnz short a_1
;;;
; 14/11/2024
jna short a_3
and ah, ah
jz short a_2
cmp al, '\'
jne short a_2
mov ah, 0
a_2:
cmp cl, 75 ; 64+8+'.'+3 -> offset 75 is the last chr
jb short a_1
; 29/11/2024
sub cx, cx
jmp short a_4
a_3:
; 29/11/2024
dec di
;;;
or ah, ah ; if period NOT found,
jnz short a_4 ; then add a .WAV extension.
SetExt:
; 29/11/2024
;dec di
mov dword [di], '.WAV' ; ! 64+12 is DOS limit
; but writing +4 must not
; destroy the following data
;mov byte [di+4], 0 ; so, 80 bytes path + 0 is possible here
; 29/11/2024
add cx, 4
add di, 4
a_4:
mov byte [di], 0
dec si
mov [PSP_CurrentOffset], si
retn
; -------------------------------------------------------------
getwavparms:
; 14/11/2024
call getWAVParameters
jc short _exit_ ; nothing to do
; 17/11/2024
mov bl, 4
sub bl, byte [WAVE_BlockAlign]
; = 0 for 16 bit stereo
; = 2 for 8 bit stereo or 16 bit mono
; = 3 for 8 bit mono
shr bl, 1 ; 0 --> 0, 2 --> 1, 3 --> 1
; 15/11/2024
adc bl, 0 ; 3 --> 1 --> 2
mov byte [fbs_shift], bl ; = 2 mono and 8 bit
; = 0 stereo and 16 bit
; = 1 mono or 8 bit
; 29/12/2024
; 30/05/2024
call codecConfig ; unmute codec, set rates.
jc init_err
; -------------------------------------------------------------
; 01/01/2025
StartPlay:
; 30/12/2024
mov byte [wpoints], 1
; 01/01/2025 (RetroDOS, 16bit)
; 09/12/2024 (TRDOS386, 32bit)
mov ax, 10548 ; (48000*10/182)*4
cmp byte [VRA], 0
jna short _w ; 48kHZ (interpolation)
;
mov ax, [WAVE_SampleRate]
mov cx, 10
mul cx
mov cl, 182
div cx
; ax = samples per 1/18.2 second
;mov cl, byte [WAVE_BlockAlign]
; 09/12/2024
;mov cl, 4 ; 16 bit, stereo
;mul cx
shl ax, 2 ; * 4
_w:
mov [wpoints_dif], ax ; buffer read differential (distance)
; for wave volume leds update
; (byte stream per 1/18.2 second)
; -------------------------------------------------------------
; 25/12/2024
inc byte [filecount]
mov byte [command], 0
; 30/12/2024
mov byte [pbprev], -1
; -------------------------------------------------------------
; 01/01/2025 (cgaplay.asm)
; 28/11/2024 (ac97play.asm)
; 25/11/2023
; 18/11/2023 (ich_wav4.asm)
; 13/11/2023 (ich_wav3.asm)
cmp byte [VRA], 1
jb short chk_sample_rate
playwav_48_khz:
mov word [loadfromwavfile], loadFromFile
;mov word [loadsize], 0 ; 65536
;;;
; 17/11/2024
;mov word [buffersize], 32768
mov ax, BUFFERSIZE/2 ; 32760
mov [buffersize], ax ; 16 bit samples
shl ax, 1 ; bytes
mov cl, [fbs_shift]
shr ax, cl
mov [loadsize], ax ; 16380 or 32760 or 65520
;;;
;jmp PlayNow ; 30/05/2024
; 01/01/2025
jmp Player_Template
chk_sample_rate:
; set conversion parameters
; (for 8, 11.025, 16, 22.050, 24, 32 kHZ)
mov ax, [WAVE_SampleRate]
cmp ax, 48000
je short playwav_48_khz
chk_22khz:
cmp ax, 22050
jne short chk_11khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_22khz_1
mov bx, load_22khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_22khz_2
mov bx, load_22khz_mono_16_bit
jmp short chk_22khz_2
chk_22khz_1:
mov bx, load_22khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_22khz_2
mov bx, load_22khz_mono_8_bit
chk_22khz_2:
mov ax, 7514 ; (442*17)
mov dx, 37
mov cx, 17
jmp set_sizes
chk_11khz:
cmp ax, 11025
jne short chk_44khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_11khz_1
mov bx, load_11khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_11khz_2
mov bx, load_11khz_mono_16_bit
jmp short chk_11khz_2
chk_11khz_1:
mov bx, load_11khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_11khz_2
mov bx, load_11khz_mono_8_bit
chk_11khz_2:
mov ax, 3757 ; (221*17)
mov dx, 74
mov cx, 17
jmp set_sizes
chk_44khz:
cmp ax, 44100
jne short chk_16khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_44khz_1
mov bx, load_44khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_44khz_2
mov bx, load_44khz_mono_16_bit
jmp short chk_44khz_2
chk_44khz_1:
mov bx, load_44khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_44khz_2
mov bx, load_44khz_mono_8_bit
chk_44khz_2:
;mov ax, 15065 ; (655*23)
; 18/11/2023 ((file size + bss + stack) <= 64KB)
;mov ax, 14076 ; (612*23)
; 17/11/2024
mov ax, 12650 ; (550*23)
mov dx, 25
mov cx, 23
jmp set_sizes
chk_16khz:
cmp ax, 16000
jne short chk_8khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_16khz_1
mov bx, load_16khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_16khz_2
mov bx, load_16khz_mono_16_bit
jmp short chk_16khz_2
chk_16khz_1:
mov bx, load_16khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_16khz_2
mov bx, load_16khz_mono_8_bit
chk_16khz_2:
;mov ax, 5461
; 17/11/2024
mov ax, 5460
mov dx, 3
mov cx, 1
jmp set_sizes
chk_8khz:
cmp ax, 8000
jne short chk_24khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_8khz_1
mov bx, load_8khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_8khz_2
mov bx, load_8khz_mono_16_bit
jmp short chk_8khz_2
chk_8khz_1:
mov bx, load_8khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_8khz_2
mov bx, load_8khz_mono_8_bit
chk_8khz_2:
mov ax, 2730
mov dx, 6
mov cx, 1
jmp set_sizes ; 02/02/2025
chk_24khz:
cmp ax, 24000
jne short chk_32khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_24khz_1
mov bx, load_24khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_24khz_2
mov bx, load_24khz_mono_16_bit
jmp short chk_24khz_2
chk_24khz_1:
mov bx, load_24khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_24khz_2
mov bx, load_24khz_mono_8_bit
chk_24khz_2:
;mov ax, 8192
; 17/11/2024
mov ax, 8190
mov dx, 2
mov cx, 1
jmp short set_sizes
chk_32khz:
cmp ax, 32000
;jne short vra_needed
; 02/02/2025
jne short chk_12khz
cmp byte [WAVE_BitsPerSample], 8
jna short chk_32khz_1
mov bx, load_32khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_32khz_2
mov bx, load_32khz_mono_16_bit
jmp short chk_32khz_2
chk_32khz_1:
mov bx, load_32khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_32khz_2
mov bx, load_32khz_mono_8_bit
chk_32khz_2:
;mov ax, 10922
; 17/11/2024
mov ax, 10920
mov dx, 3
mov cx, 2
; 02/02/2025
jmp short set_sizes
; 01/01/2025 (cgaplay.asm)
vra_needed:
; 13/11/2023
pop ax ; discard return address to the caller
; 30/05/2024
vra_err:
sys_msg msg_no_vra, 0Fh
jmp Exit
;;;;
; 02/02/2025
chk_12khz:
cmp ax, 12000
jne short vra_needed
cmp byte [WAVE_BitsPerSample], 8
jna short chk_12khz_1
mov bx, load_12khz_stereo_16_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_12khz_2
mov bx, load_12khz_mono_16_bit
jmp short chk_12khz_2
chk_12khz_1:
mov bx, load_12khz_stereo_8_bit
cmp byte [WAVE_NumChannels], 1
jne short chk_12khz_2
mov bx, load_12khz_mono_8_bit
chk_12khz_2:
;mov ax, 4096
mov ax, 4095 ; playwav8.asm
mov dx, 4
mov cx, 1
; 02/02/2025
;jmp short set_sizes
;;;;
set_sizes:
;;;
; 17/11/2024
push cx
mov cl, 2
sub cl, [fbs_shift]
; = 2 for 16 bit stereo
; = 1 for 16 bit mono or 8 bit stereo
; = 0 for 8 bit mono
shl ax, cl
pop cx
mov [loadsize], ax ; (one) read count in bytes
;;;
mul dx
cmp cx, 1
je short s_2
s_1:
div cx
s_2:
;;;
; ax = byte count of (to be) converted samples
; 17/11/2024
;;;
mov cl, [fbs_shift]
shl ax, cl
; *1 for 16 bit stereo
; *2 for 16 bit mono or 8 bit stereo
; *4 for for 8 bit mono
;;;
; ax = 16 bit stereo byte count (target buffer size)
shr ax, 1 ; buffer size is 16 bit sample count
mov [buffersize], ax
mov [loadfromwavfile], bx
; 01/01/2025 (cgaplay.asm)
; -------------------------------------------------------------
; 30/12/2024
Player_Template:
; 21/12/2024
call clearscreen
call drawplayingscreen
; 14/11/2024
call SetTotalTime
call UpdateFileInfo
; -------------------------------------------------------------
; 30/12/2024 (cgaplay.s)
; 29/12/2024 (vgaplay3.s)
; 18/12/2024 (ac97play.s)
PlayNow:
; 01/12/2024 (32bit)
; 14/11/2024
;mov al, 3 ; 0 = max, 31 = min
; 14/12/2024
mov al, [volume]
call SetPCMOutVolume@
; 15/11/2024
;;call SetMasterVolume
;call SetPCMOutVolume
;;;
; 14/11/2024
call UpdateProgressBar
;;;
; 30/05/2024
; playwav4.asm
_2:
call check4keyboardstop ; flush keyboard buffer
jc short _2 ; 07/11/2023
; 01/01/2025 (cgaplay.asm)
; play the .wav file. Most of the good stuff is in here.
call PlayWav
; 30/12/2024
; 29/12/2024 (vgaplay3.s)
; 27/12/2024 (vgaplay.s)
_3:
; close the .wav file and exit.
; 25/12/2024
call closeFile
; 01/01/2025 (16bit modifications)
; 25/12/2024
;;;
; reset file loading and EOF parameters
; 18/12/2024
mov word [count], 0
;mov dword [LoadedDataBytes], 0
mov word [LoadedDataBytes], 0
mov word [LoadedDataBytes+2], 0
mov byte [flags], 0
mov byte [stopped], 0
; 29/12/2024
mov word [pbuf_s], 0
;;;
cmp byte [command], 'Q'
je short terminate
jmp check_p_command
terminate:
call set_text_mode
Exit: ; 01/01/2025
mov ax, 4C00h ; bye !
int 21h
halt:
jmp short halt
; -------------------------------------------------------------
; 30/05/2024
pmsg_usage:
; 21/12/2024
call set_text_mode
; 01/01/2025
; 01/12/2024
sys_msg msg_usage, 0Fh
jmp short Exit
; -------------------------------------------------------------
; 30/05/2024
init_err:
; 21/12/2024
call set_text_mode
; 01/01/2025
; 01/12/2024
sys_msg msg_init_err, 0Fh
jmp short Exit
; -------------------------------------------------------------
; 01/01/2025 (cgaplay.asm)
; 21/12/2024
; 14/11/2024
PrintString:
mov ah, 0Eh
mov bx, 0Fh ; char attribute & color (white)
p_msg:
; ah = 0Eh
; bh = 0
; bl = color
; ds:si = msg address
p_next_chr:
lodsb
or al, al
jz short p_retn ; retn
int 10h
jmp short p_next_chr
p_retn:
retn
; -------------------------------------------------------------
; 01/01/2025 (cgaplay.asm)
clearscreen:
; fast clear
; 320*200, 256 colors
push es
mov di, 0A000h
mov es, di
xor di, di
mov cx, 320*200*1/2
xor ax, ax
rep stosw
pop es
retn
; -------------------------------------------------------------
; 01/01/2025v (cgaplay.asm)
drawplayingscreen:
;push es
;push bp
;push ds
;pop es
; es = ds
mov bp, PlayingScreen
mov ax, 1300h ; write character string
mov bx, 0Fh
mov cx, 24*40
xor dx, dx ; row 0, columns 0
int 10h
;pop bp
;pop es
retn
; -------------------------------------------------------------
; 01/01/2025
set_text_mode:
mov ax, 03h
int 10h
;retn
sys_msg Credits, 0Bh
;call write_audio_dev_info
;retn
jmp write_audio_dev_info
; -------------------------------------------------------------
; 01/01/2025 (16bit pop)
; 02/12/2024
Player_Quit@:
pop ax ; return addr (call PlayWav@)
; 29/11/2024
Player_Quit:
jmp terminate
; -------------------------------------------------------------
; 01/01/2025 (cgaplay.asm)
; 18/12/2024 (ac97play.asm)
; 30/12/2024 (cgaplay.s)
; 29/12/2024 (vgaplay3.s)
; 02/12/2024 (ac97play.s)
PlayWav:
; 29/05/2024 (TRDOS 386, playwav7.s)
; ((Modified from playwav4.asm, ich_wav4.asm))
; ------------------
; create Buffer Descriptor List
; Generic Form of Buffer Descriptor
; ---------------------------------
; 63 62 61-48 47-32 31-0
; --- --- -------- ------- -----
; IOC BUP -reserved- Buffer Buffer
; Length Pointer
; [15:0] [31:0]
push es
mov ax, [BDL_BUFFER] ; get segment # for BDL
mov es, ax
mov cx, 32 / 2 ; make 32 entries in BDL
xor di, di
_pw0:
movzx eax, word [WAV_BUFFER1]
shl eax, 4 ; convert seg:off ->0:offset
stosd ; store pointer to wavbuffer1
;mov eax, BUFFERSIZE / 2 ; size of buffer (32K) in (16bit) words
; 13/11/2023 (ich_wav3.asm) - 18/11/2023 (ich_wav4.asm)
mov eax, [buffersize]
;or eax, IOC + BUP
; 06/11/2023 (TUNELOOP version, without interrupt)
or eax, BUP
stosd
movzx eax, word [WAV_BUFFER2]
shl eax, 4 ; convert seg:off ->0:offset
stosd ; store pointer to wavbuffer2
;mov eax, BUFFERSIZE / 2 ; size of half buffer (32K)
; 13/11/2023 (ich_wav3.asm) - 18/11/2023 (ich_wav4.asm)
mov eax, [buffersize]
;or eax, IOC + BUP
; 06/11/2023 (TUNELOOP version, without interrupt)
or eax, BUP
stosd
loop _pw0
pop es
; 18/12/2024
;mov word [count], cx ; 0
; 14/11/2024
;mov dword [LoadedDataBytes], 0
; 19/11/2024
RePlayWav:
; load 64k into buffer 1
mov ax, [WAV_BUFFER1]
;call loadFromFile
; 13/11/2023
call word [loadfromwavfile]
; 14/11/2024
mov ax, [count]
add [LoadedDataBytes], ax
adc word [LoadedDataBytes+2], 0
; and 64k into buffer 2
mov ax, [WAV_BUFFER2]
;call loadFromFile
; 13/11/2023
call word [loadfromwavfile]
; 14/11/2024
mov ax, [count]
add [LoadedDataBytes], ax
adc word [LoadedDataBytes+2], 0
; write NABMBAR+10h with offset of buffer descriptor list
movzx eax, word [BDL_BUFFER]
shl eax, 4 ; convert seg:off to 0:off
mov dx, [NABMBAR]
add dx, PO_BDBAR_REG ; set pointer to BDL
out dx, eax ; write to AC97 controller
; 19/05/2024
call delay1_4ms
mov al, 31
call setLastValidIndex
; 19/05/2024
;call delay1_4ms
; 17/02/2017
mov dx, [NABMBAR]
add dx, PO_CR_REG ; PCM out Control Register
;mov al, IOCE + RPBM ; Enable 'Interrupt On Completion' + run
; ; (LVBI interrupt will not be enabled)
; 06/11/2023 (TUNELOOP version, without interrupt)
mov al, RPBM
out dx, al ; Start bus master operation.
; 19/05/2024
; 06/11/2023
call delay1_4ms ; 30/05/2024
;call delay1_4ms
;call delay1_4ms
;call delay1_4ms
; 30/12/2024
; -------------------------------------------
; 01/01/2025 (cgaplay.asm)
; 18/12/2024 (ac97play.asm)
; 30/12/2024 (cgaplay.s)
; 29/12/2024 (vgaplay3.s)
; 18/12/2024 (ac97play.s)
; 01/12/2024 (32bit)
; 29/11/2024
tuneLoop:
; 30/05/2024
; 18/11/2023 (ich_wav4.asm)
; 08/11/2023
; 06/11/2023
tLWait:
; 18/11/2024
cmp byte [stopped], 0
;jna short tL@
; 21/11/2024
ja short tLWait@
mov al, [tLP]
cmp al, '1'
je short tL1@
ja short tL2@
mov al, '1'
mov [tLP], al
jmp short tL1@
tLWait@: ; 21/11/2024
;;;
; 09/12/2024
cmp byte [stopped], 3
jnb _exitt_
;;;
call checkUpdateEvents
jc _exitt_
;;;
; 29/11/2024
cmp byte [command], 'N'
je _exitt_
cmp byte [command], 'P'
je _exitt_
;;;
cmp byte [tLO], '0'
je short tLWait
call tLZ
mov byte [tLO], '0'
jmp short tLWait
;tLO: db 0
tL1@:
;mov al, '1'
; 19/11/2024
mov [tLO], al
call tL0
tL1:
call updateLVI ; /set LVI != CIV/
jz _exitt_ ; 08/11/2023
;;;
;call check4keyboardstop
; 14/11/2024
call checkUpdateEvents
jc _exitt_
; 18/11/2024
cmp byte [stopped], 0
ja short tLWait@ ; 21/11/2024
;;;
call getCurrentIndex
test al, BIT0
jz short tL1 ; loop if buffer 2 is not playing
; load buffer 1
mov ax, [WAV_BUFFER1]
;call loadFromFile
; 18/11/2023
call word [loadfromwavfile]
jc short _exitt_ ; end of file
; 14/11/2024
mov ax, [count]
add [LoadedDataBytes], ax
adc word [LoadedDataBytes+2], 0
mov al, '2'
; 21/11/2024
mov [tLP], al
tL2@:
; 19/11/2024
mov [tLO], al
call tL0
tL2:
call updateLVI
jz short _exitt_ ; 08/11/2023
;;;
;call check4keyboardstop