Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

BIT HANEL

ADDRESSES

Bit-

Addressable

RAM(cont’)

‰To avoid confusion regarding the addresses 00

– 7FH

¾The 128 bytes of RAM have the byte addresses of 00

– 7FH can be accessed in

byte size using various addressing modesƒDirect and register-indirect¾The 16 bytes of RAM locations 20

– 2FH

have bit address of 00

– 7FH

ƒWe can use only the single-bit instructions and these instructions use only direct addressing mode