EEP0 Assembler

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Intro

Assembler for 16-bit EEP0 CPU designed by Professer Clarke at Imperial EEE Department.

Command Line Interface

Direct Instructions

Type in your assembly mnemonic directly and get the machine code (in binary format). 'R' in registers have to be capitalized. Numbers can be in decimal format (ex. #20) or in hexadecimal format (ex. 0x14), '#' and \0x are necessary.

Note that program will ignore missing comma. See below for example.

> ADD R3, #20
0011110000010100

> ADD R3 #20
0011110000010100

> ADD R3, 0x14
0011110000010100

> JMP R4 #23
Input Error: input is not valid assembly code

Flags

Add the following flags after assembly instructions to modify output. Flags can be used in combined fasion.

• -x: show don't care as 'X' instead of '0'
• -d: show divider between sections of machine code
• -h: show output in hexadecimal instead of binary (will ignore x and d flags)

Note that program will ignore all other flags (without returning an error). See below for examples.

> ADD R3, #20 -x
001111XX00010100

> ADD R3, #20 -d
001|1|11|00|00010100

> ADD R3, #20 -xd
001|1|11|XX|00010100

> ADD R3, #20 -h
0x3C14

> ADD R3, #20 -a
0011110000010100

Input File

Type input for program to read your assembly code from input.txt, the machine code will be in output.txt. Remember to create an input.txt beforehand, otherwise you will get File Not Found Error. See below for example.

> input
Done: output.txt written

Input File with Flags

Flags can be used to modify reading and writing of input files. If used -h, -x and -d will be ignored. If non-sense flags are used, program will print Input Error: invalid arguments after "input" detected. See below for examples.

> input -h
Done: output.txt written

> input -a
Input Error: invalid arguments after "input" detected

Generate All Possible Commands (Verification)

1. Comment all code under // Instructions & // Command Line comments.
2. Uncommment all code under // For Verification Purposes Only.
3. Compile & run ./main.

Release

• Version: 1.0.1
• Date: 2022/02/03