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From: helin@vehka.uta.fi (Mikko Helin)
Newsgroups: rec.music.synth,comp.sys.ibm.pc.hardware,sci.electronics
Subject: Re: MIDI
Message-ID: <1769@kielo.uta.fi>
Date: 14 Nov 90 13:41:36 GMT
References: <4840.tnews@basso.actrix.co.nz> <505@philpav.tds.philips.se>
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In article <505@philpav.tds.philips.se> rzi@philpav.tds.philips.se (Roman Zielinski) writes:

>
>MPU401 is a Motorola 6800-based system (not just an UART shifting out/in data
>to/from the line). It is very clever card performing all timing work. It also
>keeps track on measures, tempos, metronome bit, etc
>

MPU401 can't handle Song Position Pointers (SPPs), so the only way is to
use MPU in UART mode. All sequencer software that is claimed to understand
SPPs does this. In my opinion, Voyetras VAPI is better standard than MPU401
in IBM compatibles (I mean software drivers). 

By the way, has anybody there  written VAPI driver for modified 
RS-232 card or knows something about it? Plese tell us others!

>
>Due the timing facilities the application can work quite asyncronously to
>the hardware, and it cannot be done with a pure UART system.
>

It has been done anyway.

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MIKKO HELIN
FINLAND

INET: helin@vehka.uta.fi
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