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pep 6
pep7 simulator
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7-6. Machine Language. Every processor type has its own set of specific machine instructions; The relationship between the processor and the instructions it can There are two parts to an instruction. The 8-bit instruction specifier; And optionally, the 16-bit operand specifier. Figure 7.2 The Pep/7 instruction format. 7-11.
7. Machine Language. Characteristics of machine language: Every processor type has its own set of specific machine instructions; The relationship between Instruction Format. Figure 7.2. The Pep/7 instruction format. 12. Instruction Format. Operation code. Specifies which instruction is to be carried out. Register specifier.
Summary of Pep/9 instruction set. Category. Number in this category. Examples. Stop. 1. Stop. Data movement. 7. Load register from memory, store byte to memory. Arithmetic/Logical. 14. Add location to register, compare 2 bytes. Input/Output. 4. Output hexadecimal integer, input decimal number. Flow of Control. 12.
The instruction set architecture (ISA) is a protocol that defines how a computing machine appears to a machine language programmer or compiler. .. Example 7. Consider the following andi instruction for and-ing a register and a logical constant (a Boolean number):. andi $t0, $t0, 0xFFF. This instruction has several
Pep/9. Instruction set. Instruction Mnemonic Instruction. Addressing. Status. Specifier. Mode. Bits. 0000 0000. STOP. Stop execution. U. 0000 0001. RET. Return from CALL. U. 0000 0010 NZVC < Mem[SP]?4..7? ; A < Mem[SP+1] ; X < Mem[SP+3] ; PC < Mem[SP+5] ; SP < Mem[SP+7]. MOVSPA. A < SP. MOVFLGA.
10. 19. Instruction Format. Figure 7.2 The Pep/7 instruction format. The machine language of a particular computer is the set of binary coded instructions built into its hardware. This machine language has a 3-byte instruction format. 20. Instruction Format. Operation Code. Specifies which instruction is to be carried out.
7. Machine Language. Characteristics of machine language: – Every processor type has its own set of specific machine instructions. – The relationship 11. Instruction Format. Figure 7.2 The Pep/7 instruction format. 12. Instruction Format. Operation code. Specifies which instruction is to be carried out. Register specifier.
The 2-bit addressing-mode specifier says how to interpret the operand part of the instruction 7-13 . which is the case in this chapter. Instruction Format Figure 7.3 Difference between immediate-mode and direct-mode addressing 7-14 . 3 Subset of Pep/7 instructions 7-15 .Some Sample Instructions Figure 7. A Program
The Pep/7 Computer Simulation (also known as Pep7) is a virtual machine that is used by professors of schools and colleges to explain and simplify the lowest level of computing (machine language). True to its name, Pep/7 has seven registers and four status bits. The Pep/7 is a direct descendant of the Pep/6 virtual
The Pep/7 Computer Simulation (also known as Pep7) is a virtual machine that is used by professors of schools and colleges to explain and simplify the lowest The Pep/7's instruction set is simplistic, with only 32 possible opcodes, the instruction specifier consists of the opcode of 5 bits, a register selector (A or X) of 1 bit,
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