301 lines
5.2 KiB
NASM
301 lines
5.2 KiB
NASM
;
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; Ok, this is the sceleton that MENUET 0.01 understands.
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; Do not change the header bits for now. Compile with nasm.
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;
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include '..\..\..\macros.inc'
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use32
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org 0x0
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db 'MENUET01' ; header
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dd 0x01 ; header version
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dd START ; entry point
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dd I_END ; image size
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dd 0x1000 ; required memory
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dd 0x1000 ; esp
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dd 0x0 , 0x0 ; I_Param , I_Path
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MIDI_PORT = 0x330
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midisp: dw MIDI_PORT + 1
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mididp: dw MIDI_PORT
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START:
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mov dx, word[midisp]
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mov cx, word[mididp]
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mcall 46, 0
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test eax, eax
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jne exit
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red:
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call draw_window
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still:
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mov eax, 10 ; redraw ?
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mcall
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cmp eax, 1
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jz red
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cmp eax, 3
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jnz still
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;button:
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mov eax, 17
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mcall
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cmp al, 0
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jnz still
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cmp ah, 1
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jz exit
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cmp ah, 2
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jz .play_note
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; reset midi device
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call midi_reset
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cmp eax, 0 ; check error code
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jz still
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call printerror
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jmp still
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.play_note:
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mov eax, 50
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.nn:
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mov ebx, 100
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call noteout
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pusha
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mov eax, 5
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mov ebx, 8
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mcall
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popa
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mov ebx, 0
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; call noteout
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add eax, 3
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mov ebx, 100
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call noteout
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pusha
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mov eax, 5
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mov ebx, 8
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mcall
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popa
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mov ebx, 0
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; call noteout
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add eax, 4
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inc eax
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cmp eax, 90
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jbe .nn
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jmp still
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exit:
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mcall -1
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draw_window:
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pusha
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mov eax, 12 ; tell os about redraw
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mov ebx, 1
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mcall
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mov eax, 0 ; define and draw window
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mov ebx, 20*65536+250
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mov ecx, 20*65536+120
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mov edx, 0x14ffffff
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mov edi, title
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mcall
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mov eax, 8
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mov ebx, 10*65536+200 ; button start x & size
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mov ecx, 40 *65536+17 ; button start y & size
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mov edx, 2 ; button number
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mov esi, 0x4060b0 ; button color
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mcall
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mov ecx, 60 *65536+17 ; button start y & size
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mov edx, 3 ; button number
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mcall
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mov eax, 4
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mov ebx, 25*65536+45
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mov ecx, dword 0xffffff
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mov edx, buttont
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mov esi, buttontlen-buttont
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mcall
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mov ebx, 25*65536+65
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mov edx, buttont2
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mov esi, buttontlen2-buttont2
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mcall
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mov eax, 12 ; tell os about redraw end
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mov ebx, 2
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mcall
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popa
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ret
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noteout:
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pusha
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push ebx
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push eax
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mov ecx, 0x9f
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call midi_output_byte
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pop ecx
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call midi_output_byte
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pop ecx
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call midi_output_byte
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cmp eax, 0
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jz @f
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call printerror
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@@:
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popa
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ret
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printerror:
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mov eax, 4
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mov ebx, 15*65536+85
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mov ecx, 0x000000
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mov edx, error1
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mov esi, errorlen1-error1
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mcall
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mov eax, 4
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mov ebx, 15*65536+95
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mov ecx, 0x000000
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mov edx, error2
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mov esi, errorlen2-error2
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mcall
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ret
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; MPU401 interface
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midi_reset:
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@@:
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; reset device
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call is_output
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test al, al
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jnz @b
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mov dx, word [midisp]
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mov al, 0xff
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out dx, al
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@@:
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mov dx, word [midisp]
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mov al, 0xff
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out dx, al
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call is_input
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test al, al
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jnz @b
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call get_mpu_in
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cmp al, 0xfe
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jnz @b
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@@:
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call is_output
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test al, al
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jnz @b
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mov dx, word [midisp]
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mov al, 0x3f
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out dx, al
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ret
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midi_output_byte:
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; output byte
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@@:
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call get_mpu_in
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call is_output
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test al, al
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jnz @b
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mov al, cl
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call put_mpu_out
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ret
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is_input:
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push edx
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mov dx, word [midisp]
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in al, dx
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and al, 0x80
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pop edx
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ret
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is_output:
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push edx
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mov dx, word [midisp]
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in al, dx
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and al, 0x40
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pop edx
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ret
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get_mpu_in:
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push edx
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mov dx, word [mididp]
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in al, dx
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pop edx
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ret
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put_mpu_out:
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push edx
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mov dx, word [mididp]
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out dx, al
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pop edx
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ret
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; DATA AREA
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title db 'MIDI TEST',0
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buttont:
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db 'PLAY A FEW NOTES'
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buttontlen:
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buttont2:
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db 'RESET MIDI DEVICE'
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buttontlen2:
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error1:
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db 'NO BASE DEFINED FOR MPU-401'
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errorlen1:
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error2:
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db 'USE SETUP AND RESET MIDI DEVICE.'
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errorlen2:
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base db 0x0
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I_END:
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