Term
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Definition
| group of bits that instruct the computer to perform a specific operation. |
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Term
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Definition
| most basic element in instruction code, group of bits that define such operations as add, subtract, multiply, shift and complement. |
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Term
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Definition
| one processor register and an instruction code format with two parts. First part of instruction code specifies operation and second specifies an address. Address points to data within register that is to be operated on. |
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Term
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Definition
| second part of instruction code specifies an operand. |
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Term
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Definition
| second part of instruction code specifies the address of an operand. |
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Term
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Definition
| second part of instruction code designates and address of a memory word in which the address of the operand is found |
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Term
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Definition
| uses 12 bits to specify an address and one bit to specify the addressing mode I. I is equal to 0 for direct address and to 1 for indirect address. |
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Term
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Definition
| recognized by the operation code 111 with a 0 in the leftmost bit (bit 15) of the instruction. specifies an operation on or a test of the AC register. Operand from memory unnecessary so remaining 12 bits specify the operation or test to be executed. |
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Term
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Definition
| sequence of instructions and operands in binary that list the exact representation of instructions as they appear in computer memory |
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Term
| octal or hexadecimal code |
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Definition
| this an equivalent translation of the binary code to octal or hexadecimal representation |
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Term
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Definition
| user employs symbols (letters, numerals, or special characters) for the operation part, the address part, and other parts of the instruction code |
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Term
| high-level programming language |
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Definition
| these are special languages developed to reflect the procedures used in the solution of a problem rather than be concerned with the computer hardware behavior. |
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