MSI 163C - Manual (Page 45)

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Getting Started
and it is usually used under DOS.
Cursor Keys
The keyboard provides four cursor (arrow) keys and [Home], [PgUp], [PgDn],
[End] keys at the lower right corner, which are used to control the cursor
movement.
Move the cursor left for one space.
Move the cursor right for one space.
Move the cursor up for one line.
Move the cursor down for one line.
103-Key series 87-Key series