Subject: Re: [linux-audio-dev] mpu401 fifo scheduling on linux2.4.18
From: Bruce M Beach (brucemartinbeach_AT_21cn.com)
Date: Fri Nov 22 2002 - 23:15:55 EET
On Fri, 22 Nov 2002, Frank van de Pol wrote:
> Hi Bruce,
> the cmpci cards have the same hardware design error as the older soundblaster
> cards (eg. SB16/AWE64). The cards lack the ability to generate interrupts.....
> If you want to drive your external MIDI gear, just use an interface which
> has a decent MIDI port. In case you do not have the option to fix the ...
> ....... a high (2 kHz) timer frequency instead of the standard 100 Hz.
> Frank.
Hello Frank
Thanks for the reply. Just for fun, I downloaded the alsa code and tried
the midi fifo (midiC0D0), and got fairly chaotic results, which I suspect
was due to the 'timer' frequency, which I don't really understand what
it is. As far as the lack of an interupt goes for the card, upon reflection
I would imagine writeing a polling type driver for a multitasking system
as something of a hideous nightmare. Fortunately I am not stuck with
the cmipci card. I can replace it. I also have another option which I like
better. The korg has a jack for a standard serial port which I'll try to
hook up.
Bruce
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