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GOAL: TO Write a PEP/8 machine language simulator that simulates the PEP/8 computer and

instruction set for only the following instructions:


Instruction Specifier

Instruction

Addressing Modes

Status 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 0aaa

Decimal input trap

d

NZV

0011 1aaa

Decimal output trap

d, i

0100 1aaa

Character input

d

0101 0aaa

Character output

d, i

0111 raaa

Add to r

d, i

NZVC

1000 raaa

Subtract from r

d, i

NZVC

1001 raaa

Bitwise AND to r

d, i

NZ

1010 raaa

Bitwise OR to r

d, i

NZ

1100 raaa

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






Here are some specifics.


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