MOS commands
()-abbrev.; []-optional; <>-parameter needed; (...) misc. info
(a)rm [speed] [noplays] [trans]         |?/h (help)
(b)ank <channel> <bank>                 |! <shell command>
(ch)orus <channel> <voicelist>          |(q)uit (quit MOS)
cs <nochannels>                         |(w)ait
(e)cho <channel> <events>		|cd/pwd (cd b:)
(in)str <channel> <instrname> (I = in)	|ls [<files>...]
io <channel> <MIDI_channel> (help io)   |ll [<files>...]
(j)uke <setup_file>			|mkdir/rmdir
(pa)tch <channel> <patch> (P = pa)      |# comment
(p)lay [meter] [noplays] [trans]	|> <file> (redirect printf)
(r)ead <filename>
(rew)ind
(res)et
(sa)ve <setupfile>
(S)hutup
(se)ek <events> <unitsize>
(sl)eep <seconds> 
(s)tatus
(tr)ans <channel> <tvalue>
(tu)ne (T = tu)
