Tandy 1000 SL Technical Reference Manual page 249

NOTES
Note1
-1NT OSH is invoked and a screen dump is performed
Note2 -the scroll lock active bit is toggled
Note3 -the pause state is initiated
Note4
-1NT
1BH is invoked
Note5 -the numlock active bit is toggled
Note6 -ALT num pad generates raw ascii code of typed number
Note7 -the caps lock active bit is toggled
Note8 -hold
shift lock active until key is released
Note9 -hold control shift active until key is released
Notelo--hold alternate shift active until key is released