IBM 3278 - Cursor Address Register (2 D2, 2 D3)

Cursor Address Register (2D2, 2D3)
This 16-bit register is internal to and is set by the emulation
adapter. This register requires two addresses and can be read by
the
IBM Personal Computer. This register contains the current
value of the
I/O Address Counter. In 3278/79 emulation mode,
this register indicates the location of the cursor.
1-6