Write a PEP/8 machine language simulator that simulates the PEP/8 computer and instruction set for only the following instructions Here are some specifics. 1. Use an array to represent the memory. 2. Use variables or arrays for the PEP8 registers. I recommend putting it all into a structure. I also recommend using an array of 16 bit values for A, X, PC, SP so that you can use the r bit from the instructions to point directly to A or X. You do NOT have to include the Status bits. 3. Use unions of structures to break up the registers and instructions into the correct bits (for example, use a structure that can be unioned to break up the 8 bit specifier into the following bit combos (4, 1, 3), (5, 3), (7, 1), (8). This will allow you to instantly extract the instruction, register and addressing modes from each instruction. Also use a union to break up the 16 bit operand into two 8 bit values. 4. Have the instructions be inputted either through the command line or better yet, through a file, in the following format for each instruction: a. 6 Hexadecimal characters per instruction 5. After each instruction in the program is executed, output the PEP8 machine register values.
Write a PEP/8 machine language simulator that simulates the PEP/8 computer and instruction set for only the following instructions Here are some specifics. 1. Use an array to represent the memory. 2. Use variables or arrays for the PEP8 registers. I recommend putting it all into a structure. I also recommend using an array of 16 bit values for A, X, PC, SP so that you can use the r bit from the instructions to point directly to A or X. You do NOT have to include the Status bits. 3. Use unions of structures to break up the registers and instructions into the correct bits (for example, use a structure that can be unioned to break up the 8 bit specifier into the following bit combos (4, 1, 3), (5, 3), (7, 1), (8). This will allow you to instantly extract the instruction, register and addressing modes from each instruction. Also use a union to break up the 16 bit operand into two 8 bit values. 4. Have the instructions be inputted either through the command line or better yet, through a file, in the following format for each instruction: a. 6 Hexadecimal characters per instruction 5. After each instruction in the program is executed, output the PEP8 machine register values.
Computer Networking: A Top-Down Approach (7th Edition)
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Question
Write a PEP/8 machine language simulator that simulates the PEP/8 computer
and instruction set for only the following instructions
Here are some specifics.
1.
Use an array to represent the memory.
2.
Use variables or arrays for the PEP8 registers. I recommend putting it all into a
structure. I also recommend using an array of 16 bit values for A, X, PC, SP so
that you can use the
r
bit from the instructions to point directly to A or X. You
do
NOT
have to include the Status bits.
3.
Use unions of structures to break up the registers and instructions into the
correct bits (for example, use a structure that can be unioned to break up the 8
bit specifier into the following bit combos (4, 1, 3), (5, 3), (7, 1), (8). This will
allow you to instantly extract the instruction, register and addressing modes
from each instruction. Also use a union to break up the 16 bit operand into two
8 bit values.
4.
Have the instructions be inputted either through the command line or better
yet, through a file, in the following format for each instruction:
a.
6 Hexadecimal characters per instruction
5.
After each instruction in the program is executed, output the PEP8 machine
register values.
Transcribed Image Text:Instruction
Addressing
Status
Instruction
Specifier
Modes
Bits
0000 0000
Stop execution
NA
0001 100r
Bitwise invert r
NA
NZ
0001 110r
Arithmetic shift left r
NA
NZVC
0001 111r
Arithmetic shift right r NA
NZC
0010 000r
Rotate left r
NA
C
0010 001r
Rotate right r
NA
C
0011 Oaaa
Decimal input trap
d
NZV
0011 laaa
Decimal output trap
d. i
0100 laaa
Character input
d
0101 Oaaa
Character output
d, i
0111 raaa
Add to r
d, i
NZVC
1000 raaa
Subtract from r
d, i
NZVC
1001 raaa
Bitwise AND tor
d, i
NZ
1010 raaa
Bitwise OR to r
d, i
NZ
1100 гaaa
Load r from memory
d, i
NZ
1101 raaa
Load byte from memory d, i
NZ
1110 raaa
Store r to memory
d
1111 raaa
Store byte r to memory d
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