They mostly stuck to standard control codes.

Ctrl+A : Insert Mode Toggle
Ctrl+C : Break
Ctrl+D : Cancel the Initialization of SPRITE, CGEN2, CTRL+A
Ctrl+E : Delete After Cursor
Ctrl+G : Beep
Ctrl+H : Delete Before Cursor
Ctrl+J : Line Feed
Ctrl+K : Cursor to Home Position (Shift + CLRHOME)
Ctrl+L : Clear Screen
Ctrl+M : CRLF (Return)
Ctrl+R : Insert
Ctrl+V : Kana Input Mode
Ctrl+W : Alphanumeric Input Mode
Ctrl+Z : Clear After Cursor