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To start executing a computer, the start address of program is loaded into ______ MBR MAR PC x accumulator What is the maximum directly addressable memory capacity (in bytes) if the address bus is 11 bits? (remember that 2^10 = 1024 = 1 K) 2 Kbytes x 4 Kbytes 10 Kbytes 20 Kbytes For a processor with a 30-bit address bus and a 32-bit data bus, how many bits are needed for the program counter? 64 16 30 x 32 The binary string 110011.011 is equivalent to ________. 33.6_16 x 33.3_16 66.6_16 66.3_16