BarinkOS/source/kernel/drivers/cmos/cmos.cpp

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void ReadFromCMOS(unsigned char array[])
{
unsigned char tvalue, index;
for (index = 0; index < 128; index++)
{
asm(
"cli\n\t" // Disable interrupts
"mov al, index\n\t" // Move index address
// since the 0x80 bit of al is not set, NMI is active
"out 0x70,al\n\t" // Copy address to CMOS register
// some kind of real delay here is probably best
"in al,0x71\n\t" // Fetch 1 byte to al
"sti\n\t" // Enable interrupts
"mov tvalue,al\n\t");
array[index] = tvalue;
}
}
void WriteTOCMOS(unsigned char array[])
{
unsigned char index;
for(index = 0; index < 128; index++)
{
unsigned char tvalue = array[index];
asm("cli\n\t" // Clear interrupts
"mov al,index\n\t" // move index address
"out 0x70,al\n\t" // copy address to CMOS register
// some kind of real delay here is probably best
"mov al,tvalue\n\t" // move value to al
"out 0x71,al\n\t" // write 1 byte to CMOS
"sti\n\\t" ); // Enable interrupts
}
}