IBM XT 5160 Technical Reference page 368

Notes:
1. Asterisk (*) can be typed using two methods: press the
(PrtSc/*) key or, in the shift mode, press the 8 key.
2. Period (.) can be typed using two methods: press the. key
or, in the shift or Num Lock mode, press the Del key.
3. Numeric characters 0-9 can be typed using two methods:
press the numeric keys on the top row of the keyboard or, in
the shift or Num Lock mode, press the numeric keys in the
keypad portion of the keyboard.
4. Uppercase alphabetic characters (A-Z) can be typed in two
modes: the shift mode or the Caps Lock mode.
5. Lowercase alphabetic characters (a-z) can be typed in two
modes: in the normal mode or in Caps Lock and shift mode
combined.
6. The three digits after the Alt key must be typed from the
numeric keypad. Character codes 001-255 may be entered in
this fashion (with Caps Lock activated, character codes
97-122 will display uppercase).
Characters, Keystrokes, and Colors 7-13