YMF724 ETC, YMF724 Datasheet - Page 37

• Manufacturer Part Number: YMF724
• Description: high performance audio controller for the PCI Bus
• Manufacturer: ETC

YMF724F
2-3. MPU401
2-4. Joystick
The following shows the MPUBase I/O map for MPU401.
+1h (W)
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.
JSBase
JACX...
JACY...
JBCX...
JBCY...
JAB1...
JAB2...
JBB1...
JBB2...
+1h (R)
port
+0h
port
+0h
MPUBase
MPUBase + 1h
MPUBase + 1h
/DSR
JBB2
D7
D7
(R/W)
Joystick A, Coordinate X
Joystick A, Coordinate Y
Joystick B, Coordinate X
Joystick B, Coordinate Y
Joystick A, Button 1
Joystick A, Button 2
Joystick B, Button 1
Joystick B, Button 2
/DRR
JBB1
D6
D6
(R/W)
(R)
(W)
JAB2
D5
D5
-
MIDI Data port
Status Register port
Command Register port
JAB1
D4
D4
-
Command
-37-
Data
JBCY
D3
D3
-
JBCX
D2
D2
-
JACY
D1
D1
-
JACX
January 14, 1999
D0
D0
-