Part 1 of 3
A uni-processor system, having single-core, has 8 general-purpose registers. The machine has 256-byte RAM. The size of every register and memory word is 16 bits. The computer uses fixed-length instructions of size 16 bits each. An instruction of the machine can have only one operand, which can be either a direct memory operand or a register operand. Both these operands use direct addressing. An instruction of a machine consists of bits for operation code, one bit for addressing mode, and bits for memory operand or register operand. The machine has about 128 different operation codes. The addressing mode bits specifies addressing mode as:
Addressing mode bit Register Operand Memory Operand
0 - Direct
1 Direct -
Part 1 of 3
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