YMF724F
September 21, 1998
-37-
2-3. MPU401
This block is for transmitting and receiving MIDI data. It is compatible with UART mode of “MPU401”.
Full duplex operation is possible using the 16-byte FIFO for each direction, transmitting and receiving.
The following shows the MPUBase I/O map for MPU401.
MPUBase (R/W) MIDI Data port
MPUBase + 1h (R) Status Register port
MPUBase + 1h (W) Command Register port
portD7D6D5D4D3D2D1D0
+0h Data
+1h (W) Command
+1h (R)/DSR/DRR------
2-4. Joystick
JSBase (R/W)
portD7D6D5D4D3D2D1D0
+0h JBB2 JBB1 JAB2 JAB1 JBCY JBCX JACY JACX
JACX... Joystick A, Coordinate X
JACY... Joystick A, Coordinate Y
JBCX... Joystick B, Coordinate X
JBCY... Joystick B, Coordinate Y
JAB1... Joystick A, Button 1
JAB2... Joystick A, Button 2
JBB1... Joystick B, Button 1
JBB2... Joystick B, Button 2
