diff --git a/src/hardware/cmos.cpp b/src/hardware/cmos.cpp
index 08b08b0d..e44933b1 100644
--- a/src/hardware/cmos.cpp
+++ b/src/hardware/cmos.cpp
@@ -175,6 +175,7 @@ static Bit8u cmos_readreg(Bit32u port) {
 	case 0x18:		/* Extended memory in KB High Byte */
 	case 0x30:		/* Extended memory in KB Low Byte */
 	case 0x31:		/* Extended memory in KB High Byte */
+//		LOG(LOG_BIOS,LOG_NORMAL)("CMOS:Read from reg %F : %04X",cmos.reg,cmos.regs[cmos.reg]);
 		return cmos.regs[cmos.reg];
 	default:
 		LOG(LOG_BIOS,LOG_NORMAL)("CMOS:Read from reg %F",cmos.reg);
@@ -182,6 +183,11 @@ static Bit8u cmos_readreg(Bit32u port) {
 	}
 }
 
+void CMOS_SetRegister(Bitu regNr, Bit8u val)
+{
+	cmos.regs[regNr] = val;
+};
+
 void CMOS_Init(Section* sec) {
 	IO_RegisterWriteHandler(0x70,cmos_selreg,"CMOS");
 	IO_RegisterWriteHandler(0x71,cmos_writereg,"CMOS");