Which chip was the first RTC and CMOS RAM chip to be used in early IBM computers, capable of storing a total of 64 bytes?$

Which chip was the first RTC and CMOS RAM chip to be used in early IBM

1.	Which chip was the first RTC and CMOS RAM chip to be used in early IBM computers, capable of storing a total of 64 bytes?$
A.	The Samsung 146818
B.	The Samsung 146819
C.	The Motorola 146818
D.	The Motorola 146819
Answer» D. The Motorola 146819