Alesis MMT-8 Service Manual 1.00 5
10.00 Software History
DATE VERSION COMMENTS
11/1/87 1.02 First production release
12/1/87 1.03 1) Fixes tape sync output so that when a part or song loops, a clock output pulse isn't
skipped.
2) Outputs MIDI controller 64 (sustain pedal) at value 0 (off) once for each MIDI
channel whenever a part or song is stopped so as to stop synths from sustaining.
3) Changed MIDI test routine so that an extra byte is sent out before testing MIDI to
accommodate 8051s that have indeterminate data in the UART on power up.
THIS VERSION WAS NEVER RELEASED.
12/8/87 1.04 1) Fixes STEP EDIT bug that caused erroneous data to be displayed if an event other
than the first or last event on a beat is moved to another beat.
2) Also in STEP EDIT, editing the sub-beats now do not allow decrementing below
beat 001/00.
12/16/87 1.05 1) Fixes cassette output bug that would occasionally cause a part to output data much
longer than it should, which would make the cassette interface data unusable.
12/30/87 1.06 1) Fixes cassette input bug that would cause data to be corrupted if only part 99 is
loaded in from tape.
1/4/88 1.07 1) Fixes cassette input bug that would cause part 99 to be erased if a single part or
song was loaded in, or a cassette was verified.
5/26/88 1.08 1) When in record on a part in loop, the display will no longer remain displaying
"RECORDING" after looping. The display will still not change when punching in or
out (to reduce delays).
2) Fixes bug that would cause an incorrect display if aborting "LOAD ONE PART"
before tape data has begun when previously in song mode, and aborting "LOAD ONE
SONG" before tape data has begun when previously in part mode.
3) Fixes bug that caused the display in part edit mode to show the incorrect beat
number for beats 456 through 511. This bug was also present in insert note (COPY
button) while in edit part mode.
4) Fixes bug that caused the display to lock up flashing between "CHANGE
LENGTH" & "MEMORY FULL" if an attempt was made to change the length of a
part when memory was full.
5) Fixes bug that would cause the end point of a track or part to be erased if part of a
track or part (i.e., only notes, controllers, MIDI channel 1, etc.) was erased. This
would not cause a problem while playing a part, but would result in the part following
this one in a song not to play.
6) Fixes bug that would cause any notes with durations of 2/64 or any multiple thereof
to be increased by 2/64. This would occur when changing length, quantizing, or
copying any part or track.
7) Increased delay loops in display routines so that fewer LCD displays would be
rejected in production.
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