AAEON IMBA-Q77 User Manual

Page 118

I n d u s t r i a l M o t h e r b o a r d

I M B A - Q 7 7

Appendix E Digital Input & Output

E-7

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// Procedure : AaeonDigitalInput

boolean AaeonDigitalInput(int byte LDN, int byte RegNum, int byte
BitNum){

int byte ByteTempValue0 = 0;

// Enter SIO MB PnP mode

outportb (SIOIndex, 0x87);

// Select Logic Device Number Register

outportb (SIOIndex, 0x07); // SIO LDN Register Offset = 0x07

outportb (SIOData, LDN);

// Select register offset, and read the register value

outportb (SIOIndex, RegNum);

ByteTempValue0 = inportb (SIOData);

// Exit SIO MB PnP mode

outportb (SIOIndex, 0xAA);

ByteTempValue0 &= (1 << BitNum);

if(ByteTempValue0)

{ return 1; }

else

{ return 0; }

}
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