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Function RTCMOSRead

This function can read one byte of battery-backed CMOS RAM:

BYTE RTCMOSRead(BYTE Addr);

Parameters

Addr

The byte offset within the CMOS RAM of the value to retrieve.

return value

The retrieved value.

Example:

printf("The equipment byte of this PC is: %u\n", RTCMOSRead(0x14));

RTCMOSRead only works on systems equipped with an MC146818A Real-Time Clock or compatible device. The contents of the CMOS RAM area are valid only if it has been initialized by a BIOS or by the program itself.

Function RTCMOSWrite