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參數(shù)資料
| 型號： | IT8712F |
| 英文描述： | EC-LPC I/O Programming Guide EC-v0.2 | PC Product Line |
| 中文描述： | 歐盟預(yù)測編碼的I / O編程指南歐共體v0.2 |個人電腦產(chǎn)品線 |
| 文件頁數(shù)： | 23/30頁 |
| 文件大?。?/td> | 311K |
| 代理商： | IT8712F |
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Programming Sequence and Flow Charts
Go in Configuration
out 2e 87
out 2e 87
Input, Output
Set LDN = 08h
out 2e 07
out 2f 08
Get Game Port base address
out 2e 60
in 2f
out 2e 61
in 2
f
Send Game Port Message
Figure 4-8.
Game Port I/O Flow Chart
The Game port integrates four timers for two joysticks. The IT8710F allows the Game Port base address to be
located within the host I/O address space 100h to 0FFFh. Currently, most game software assume that the
Game (or Joystick) I/O port is located at 201h.
A write to the Game port base address will trigger four timers. A read from the same address returns four bits
that correspond to the output from the four timers, and other four status bits corresponding to the joystick
buttons will also be returned. A button value of 0 indicates that the button is pressed. When the Game port
base address is written, the X/Y timer bits go high. Once the Game port base address is written, each timer
output remains high for a duration of time determined by the current joystick position.
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