?? midi.inc
字號:
is_input:
push edx
mov dx,word [midisp]
in al,dx
and al,0x80
pop edx
ret
is_output:
push edx
mov dx,word [midisp]
in al,dx
and al,0x40
pop edx
ret
get_mpu_in:
push edx
mov dx,word [mididp]
in al,dx
pop edx
ret
put_mpu_out:
push edx
mov dx,word [mididp]
out dx,al
pop edx
ret
setuart:
su1:
call is_output
cmp al,0
jnz su1
mov dx,word [midisp]
mov al,0xff
out dx,al
su2:
mov dx,word [midisp]
mov al,0xff
out dx,al
call is_input
cmp al,0
jnz su2
call get_mpu_in
cmp al,0xfe
jnz su2
su3:
call is_output
cmp al,0
jnz su3
mov dx,word [midisp]
mov al,0x3f
out dx,al
ret
align 4
sys_midi:
cmp [mididp],0
jnz sm0
mov [esp+36],dword 1
ret
sm0:
cmp eax,1
mov [esp+36],dword 0
jnz smn1
call setuart
ret
smn1:
cmp eax,2
jnz smn2
sm10:
call get_mpu_in
call is_output
test al,al
jnz sm10
mov al,bl
call put_mpu_out
ret
smn2:
ret
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