Writing an assembler in Python

[member thudfoo]

On Tue, Mar 2, 2010 at 10:52 PM, Gregory Ewing
<greg.ewing at canterbury.ac.nz> wrote:
>> In article <Xns9D28186AF890Cfdnbgui7uhu5h8hrnuio at 127.0.0.1>,
>> Giorgos Tzampanakis  <gt67 at hw.ac.uk> wrote:
>>
>>> I'm implementing a CPU that will run on an FPGA. I want to have a
>>> (dead) simple assembler that will generate the machine code for
>>> me. I want to use Python for that. Are there any libraries that
>>> can help me with the parsing of the assembly code?
>
> I wrote a PIC assembler in Python once. I didn't bother
> with any parsing libraries. I used a regular expression
> to split the input into tokens, then wrote ad-hoc
> parsing code in Python.
>
> --
> Greg
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I used Plex.

The lexer is here: http://pastebin.com/9Rm4rDfu

The target for the assembler is a toy single-byte processor.