> Can someone briefly explain how MIDIPlugin is supposed to work?
>
> In the code for SimpleMIDIPort I see the following method.
>
>> primMIDIOpenPort: portNum readSemaIndex: readSemaIndex
>> interfaceClockRate: interfaceClockRate "Open the given MIDI port. If
>> non-zero, readSemaIndex specifies the index in the external objects
>> array of a semaphore to be signalled when incoming MIDI data is
>> available. Not all platforms support signalling the read semaphore.
>> InterfaceClockRate specifies the clock rate of the external MIDI
>> interface adaptor on Macintosh computers; it is ignored on other
>> platforms."
>>
>> <primitive: 'primitiveMIDIOpenPort' module: 'MIDIPlugin'> self
>> primitiveFailed.
>
> I'm guessing that the line "<primitive: 'primitiveMIDIOpenPort' module:
> 'MIDIPlugin'> self" is call to something external to the current squeak
> image.
>
> When I try to execute the primMIDIOpenPort method I get a
> "primitivefailed" error message.  Is this because my current image can't
> find the external resource?
>
> I'm running Ubuntu 7.04, and in the Squeak directory there is file
> called "SqueakPlugin.image".  I tried copying that to same directory
> with my squeak image file, but it doesn't help.  Am I supposed to
> somehow load the plugin into my image before invoking the method?