🚀 go-pugleaf

wlsmith@valve.heart.rri.uwo.ca (Wayne Smith) writes:

>In article <Jan05.224636.36025@yuma.ACNS.ColoState.EDU> millerje@CS.ColoState.EDU (Jeff Miller) writes:
>>The best advice I can give you would be to go for a MPU401 
>>compatible.  This way you won't be limited when it comes to support (many
>>shareware/freeware MIDI sw supports nly the MPU 401 standard)

>What is "MPU 401" compatability?
>MIDI is a serial data transfer of 31.5 kbaud.  What "magic" does an MPU
>401 card do? Does it have a buffer? Does it have intelligence?  Has
>anyone ever programmed it at a low level?  How many registers does it have?


MPU-401 compatibility refers to compliance with Roland's MPU-401 MIDI 
interface implementation which has become the defacto standard.

Functions a card provides include 
	buffering data recieved from both MIDI-in and the PC, essentially
	speed matching the PC with MIDI

	Filtering MID-in messages

	clocking and time stamping tasks (MIDI cards have their own
	high resolution clock)

	MIDI-in to MIDI-out transfer (MIDI-thru) with filtering

For more info, I recomend the Music Quest Interface Technical Reference,
from which this response was paraphrased.


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