Intel 386 Manual do Utilizador descarregar pdf (Página 283)

Intel386™ EX EMBEDDED PROCESSOR USER’S MANUAL

CountL = _GetEXRegByte(TMR2);

CountH = _GetEXRegByte(TMR2);

Count = (((WORD)CountH << 8) + CountL);

EnableTimer();

return(Count);

}/* ReadCounter */

/*****************************************************************************

Description:

Interrupt Service Routine for Timer-generated interrupts.

Assumptions:

Not called by user.

Real/Protected Mode:

No changes required

******************************************************************************/

void interrupt far TimerISR(void)

/* Write message out to serial port as an example */

SerialWriteStr(SIO_0, “In TimerISR\n”);

NonSpecificEOI(); // If this ISR services Timer1 or Timer2,

// an EOI is also needed for the Slave 8259

}/* TimerISR */

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Intel 386 Manual do Utilizador Página 283