YMF724F
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
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 |
port
D7
D6
D5
D4
D3
D2
D1
D0
+0h |
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+1h (W) |
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+1h (R) | /DSR | /DRR | - | - |
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2-4. Joystick
JSBase (R/W)
port | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
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+0h | JBB2 | JBB1 | JAB2 | JAB1 | JBCY | JBCX | JACY | JACX |
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JACX... | Joystick A, Coordinate X |
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JACY... | Joystick A, Coordinate Y |
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JBCX... | Joystick B, Coordinate X |
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JBCY... | Joystick B, Coordinate Y |
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JAB1... | Joystick A, Button 1 |
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JAB2... | Joystick A, Button 2 |
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JBB1... | Joystick B, Button 1 |
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JBB2... | Joystick B, Button 2 |
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September 21, 1998
