2011-10-14 23:38:50 +02:00
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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2012-03-13 17:51:57 +01:00
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;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
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2011-10-14 23:38:50 +02:00
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; PLAYNOTE.INC version 1.1 22 November 2003 ;;
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;; ;;
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;; Player Notes for Speaker PC ;;
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;; subfunction #55 from function #55 Menuet OS ;;
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;; ;;
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;; Copyright 2003 VaStaNi ;;
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;; vastani@ukr.net ;;
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;; >>>- SIMPLY - QUICKLY - SHORTLY -<<< ;;
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;; ;;
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;; Note: playnote.txt ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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align 4
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sound_interface:
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cmp eax, ebx ; this is subfunction #55 ?
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jne retFunc55 ; if no then return.
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cmp byte [sound_flag], 0
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jne retFunc55
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movzx eax, byte [countDelayNote]
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or al, al ; player is busy ?
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jnz retFunc55 ; return counter delay Note
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mov [memAdrNote], esi;edx
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call get_pid
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mov [pidProcessNote], eax
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xor eax, eax ; Ok! EAX = 0
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retFunc55:
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mov [esp+32], eax ; return value EAX for application
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ret
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iglobal
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align 4
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kontrOctave dw 0x4742, 0x4342, 0x3F7C, 0x3BEC, 0x388F, 0x3562
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dw 0x3264, 0x2F8F, 0x2CE4, 0x2A5F, 0x2802, 0x25BF
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memAdrNote dd 0
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pidProcessNote dd 0
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slotProcessNote dd 0
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count_timer_Note dd 1
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mem8253r42 dw 0
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countDelayNote db 0
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endg
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playNote:
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; jmp NotPlayNotes
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mov esi, [memAdrNote]
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or esi, esi ; ESI = 0 ? - OFF Notes Play ?
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jz NotPlayNotes ; if ESI = 0 -> ignore play pocedure
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cmp eax, [count_timer_Note]
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jb NotPlayNotes
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push eax
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inc eax
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mov [count_timer_Note], eax
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mov al, [countDelayNote]
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dec al ; decrement counter Delay for Playing Note
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jz NewLoadNote@Delay
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cmp al, 0xFF ; this is first Note Play ?
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jne NextDelayNote
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;This is FIRST Note, save counter channel 2 chip 8253
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mov al, 0xB6 ; control byte to timer chip 8253
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out 0x43, al ; Send it to the control port chip 8253
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in al, 0x42 ; Read Lower byte counter channel 2 chip 8253
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mov ah, al ; AH = Lower byte counter channel 2
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in al, 0x42 ; Read Upper byte counter channel 2 chip 8253
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mov [mem8253r42], ax ; Save counter channel 2 timer chip 8253
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NewLoadNote@Delay:
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cld
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; lodsb ; load AL - counter Delay
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call ReadNoteByte
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or al, al ; THE END ?
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jz EndPlayNote
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cmp al, 0x81
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jnc NoteforOctave
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mov [countDelayNote], al
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; lodsw ; load AX - counter for Note!
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call ReadNoteByte
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mov ah, al
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call ReadNoteByte
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xchg al, ah
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jmp pokeNote
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EndPlayNote: ; THE END Play Notes!
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in al, 0x61 ; Get contents of system port B chip 8255
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and al, 0xFC ; Turn OFF timer and speaker
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out 0x61, al ; Send out new values to port B chip 8255
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mov ax, [mem8253r42] ; memorize counter channel 2 timer chip 8253
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xchg al, ah ; reverse byte in word
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out 0x42, al ; restore Lower byte counter channel 2
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mov al, ah ; AL = Upper byte counter channel 2
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out 0x42, al ; restore Upper byte channel 2
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xor eax, eax ; EAX = 0
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mov [memAdrNote], eax; clear header control Delay-Note string
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NextDelayNote:
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mov [countDelayNote], al; save new counter delay Note
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pop eax
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NotPlayNotes:
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RET
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NoteforOctave:
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sub al, 0x81 ; correction value for delay Note
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mov [countDelayNote], al; save counter delay this new Note
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; lodsb ; load pack control code
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call ReadNoteByte
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cmp al, 0xFF ; this is PAUSE ?
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jne packCode ; no, this is PACK CODE
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in al, 0x61 ; Get contents of system port B chip 8255
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and al, 0xFC ; Turn OFF timer and speaker
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out 0x61, al ; Send out new values to port B chip 8255
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jmp saveESI
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packCode:
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mov cl, al ; save code
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and al, 0xF ; clear upper bits
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dec al ; correction
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add al, al ; transform number to offset constant
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movsx eax, al ; EAX - offset
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add eax, dword kontrOctave; EAX - address from constant
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mov ax, [eax] ; read constant
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shr cl, 4 ; transform for number Octave
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shr ax, cl ; calculate from Note this Octave!
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pokeNote:
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out 0x42, al ; Lower byte Out to channel 2 timer chip 8253
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mov al, ah
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out 0x42, al ; Upper byte Out to channel 2 timer chip 8253
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in al, 0x61 ; Get contents of system port B chip 8255
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or al, 3 ; Turn ON timer and speaker
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out 0x61, al ; Send out new values to port B chip 8255
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saveESI:
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; mov [memAdrNote], esi ; save new header control Delay-Note string
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pop eax
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RET
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ReadNoteByte:
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;result:
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; al - note
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push eax
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push ecx
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push edx
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push esi
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mov eax, [pidProcessNote]
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call pid_to_slot
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test eax, eax
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jz .failed
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lea ecx, [esp+12]
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mov edx, 1
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mov esi, [memAdrNote]
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inc [memAdrNote]
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call read_process_memory
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.failed:
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pop esi
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pop edx
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pop ecx
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pop eax
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ret
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;------------------- END CODE -------------------
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