PC87366 Datasheet, PDF (161/240 Pages) National Semiconductor (TI) – 128-Pin LPC SuperI/O with System Hardware Monitoring, MIDI and Game Ports

9.0 Game Port (GMP) (Continued)
9.3.4 Game Port Extended Status Register (GMPXST)
This register indicates which of the corresponding game device interface events have occurred. Writing 1 to a bit clears it.
Reading a position counter clears the corresponding Counter Ready bit. Writing to a bit 0 has no effect.
This register is functional only in Enhanced mode.
Location: Offset 02h
Type:
R/W1C
Bit
Name
Reset
7
Device B
Button 1
Event
Status
0
6
Device B
Button 0
Event
Status
0
5
Device A
Button 1
Event
Status
0
4
Device A
Button 0
Event
Status
0
3
2
1
0
Device B
Y-Position
Counter
Ready
Device B
X-Position
Counter
Ready
Device A
Y-Position
Counter
Ready
Device A
X-Position
Counter
Ready
0
0
0
0
Bit
Description
7 Device B Button 1 Event Status. When set to 1, it indicates that a Device B Button 1 event has occurred. The
event itself is defined by the GMPEPOL register, see Section 9.3.14.
0: Event not active (default)
1: Event active
6 Device B Button 0 Event Status. When set to 1, it indicates that a Device B Button 0 event has occurred. The
event itself is defined by the GMPEPOL register, see Section 9.3.14.
0: Event not active (default)
1: Event active
5 Device A Button 1 Event Status. When set to 1, it indicates that a Device A Button 1 event has occurred. The
event itself is defined by the GMPEPOL register, see Section 9.3.14.
0: Event not active (default)
1: Event active
4 Device A Button 0 Event Status. When set to 1, it indicates that a Device A Button 0 event has occurred. The
event itself is defined by the GMPEPOL register, see Section 9.3.14.
0: Event not active (default)
1: Event active
3 Device B Y-Position Counter Ready. When set to 1, it indicates that the value of the Y-position counter of
Device B can now be read.
0: Event not active (default)
1: Event active
2 Device B X-Position Counter Ready. When set to 1, it indicates that value of the X-position counter of Device
B can now be read.
0: Event not active (default)
1: Event active
1 Device A X-Position Counter Ready. When set to 1, it indicates that the value of the Y-position counter of
Device A can now be read.
0: Event not active (default)
1: Event active
0 Device A X-Position Counter Ready. When set to 1, it indicates that the value of the X-position counter of
Device A can now be read.
0: Event not active (default)
1: Event active
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