Bubonic Assember

In order to simplify conversion of assembly language to bits, we decided to implement an assembler. It is written in Java.

Output

• HTML summary file
  • Link to input .asm file
  • Link to output .mem file
  • Memory address of each instruction
  • Instruction field values in decimal
  • Hexadecimal value of each instruction
• Xilinx RAM LogiBLOX memfile
  • Only requires renaming to be dropped directly into project
  • Places instructions into memory beginning with address 0x0000
  • Uses hexadecimal notation for instruction data
  • Appends an infinite loop instruction to the end of each program, to effectively pause the processor
    • beq $zero, $zero, -1

    • 2

      0

      0

      -1

    • Hexadecimal value 0x203F

What it Can Do

• Convert Bubonic Assembly Language to binary form
• Process labels and convert them to the represented address
• Allows both numerical values and labels for all immediates
• Supports both decimal or hexadecimal forms for all numbers (immediate values, addresses, register numbers)
• Both numerical register addressing ($5) and named registers ($sp)
• Catch and report improperly formatted instructions

What it Cannot Do

• Rewrite pseudoinstructions, such as larger-than-allowed immediate values. In these cases, a warning and a suggested change are given.

It is easiest to see the features of our assembler by viewing examples, which can be found on the benchmarks page.