Created a circular buffer for printed string values
Merge branch 'master' into command-history
command history almost working
all dat 7 bit
Cat prints out only zeroes

switched to mem_loc from mem_master, calculate duration in cat now,
changed so printout messages should be right now
Add stores pure MIDI in MIDI_ON, MIDI_OFF
Convert 16th notes to time ticks

480 ticks/quarter note.
switched back to mem_master from mem_loc

Switched $a3 to using mem_master instead of mem_loc
Fixed add.s (mult to mul)
command history is working
Merge branch 'command-history'
Merge remote-tracking branch 'upstream/master'