Posted: July 25, 2012
naken_asm is a lightweight assembler / disassembler with a focus on being easy to compile (no dependencies) and easy to use. It was originally called naken430asm, but since it has been expanded it to support many more CPUs it has been renamed to naken_asm. Additionally, there is also a simulator for some of the supported CPUs.
Stable here means I've been using it and proved it's working well. Beta means all the code is down but I haven't gotten a chance to write much code around it. If anyone else has been using one of these assemblers / disassemblers and finds it stable please let me know.
The source repository is really the best place to get naken_asm since it will have all the latest bug fixes and features. It should compile easily on Linux, BSD, or any other OS. Just install gcc and type ./configure and then make.
Repository: git clone https://github.com/mikeakohn/naken_asm.git
How To Help
launchpad_blink.asm - Make 2 LED's blink with the MSP430 Launchpad
In order to give confidence that naken_asm isn't going to hinder anyone else's development, I've been adding 3 different types of tests to the build system. The unit and regression tests should be obvious what they do. For the comparison tests, I created a text file with every single instruction, assembled each instruction one by one using someone else's assembler (usually the GNU gas assembler), and used a bash script to compare the output of naken_asm with the output of these assemblers.
Unit Tests: eval_exression(), var.h, data, macros, memory, symbol table, get_token
Regression Tests: 805x, avr8, dspic, msp430, stm8, tms9900, z80
Comparison Tests: 6502, 8051, 65816, 68000, ARM (not complete), AVR8, dsPIC, Epiphany, MIPS, MSP430, MSP430X, PIC32, Playstation 2 Emotion Engine, STM8, Z80
65xx - Support for 6502, 65c02, 6507, 6510, and any chip of this 8 bit family.
65C816 - Support for the 16 bit version of the 6502. Example of this working here: Apple IIgs Java
68HC08/CPU08 - 68HC08 microcontroller instruction (CPU08). I did this specifically for the 68HC908GP32.
680x0/CPU32 - My target for this minimum 68000 for Amiga programming or Sega Genesis or such. I may add Amiga executable support for input and output.
8051/8052 - Support for 8051 and 8052 8 bit family chips (also known as MCS-51). I tested some code on an Atmel AT89S52.
ARM - Disassembler and assembler are mostly done for generic instructions. I made a small program to prove it working on the Raspberry Pi here.
STM8 - Added support for STM8. Valentin Dudouyt has created a tool to flash the STM8 Disovery board with Linux: https://github.com/vdudouyt/stm8flash.
TMS1000/TMS1100 - An old TI 4 bit CPU that's used in the Speak & Spell, Speak & Math, some old calculators, and others.
TMS9900 - One of the first 16 bit CPUs. From the looks of it it seems to be the grandfather of the MSP430. I didn't use TMS9900 standard syntax for hex, but I can change it if i get requests.
I've been working on a README I'm going to start including with the
August 4, 2016: Released a new tarball and RPM and such for naken_asm. I decided I should probably run the 8051 through some heavy tests so now the output for every instruction assembled in naken_asm is tested against the output of the c51asm 8051 assembler. Found a couple bugs in there. Also thanks to borstel there are some fixes in the avr8 simulator.
July 9, 2016: Released a new tarball and RPM and such for naken_asm. The biggest change in the new release is Playstation 2 Emotion Engine support.
June 4, 2016: Working on the Playstation 2 Emotion Engine vector unit assembler. Finding what appear to be errors in the documentation for the vector units. The instruction ABS.dest fs, ft appears it should be written as ABS.dest ft, fs. The gnu-as assembler for the vector units want ft, fs. I'm going with the GNU on this, but need to look into this later.
May 12, 2016: Emotion Engine is complete. Now I have to decide if I also want to enter the MIPS SIMD instructions (since MIPS has its own vector instructions that are different from the Playstation 2's vector instructions).
May 8, 2016: I've been adding MIPS64 and Playstation 2 Emotion Engine instructions. I really want to make a Playstation 2 demo, but we'll see. This PDF I'm using with all the Emotion Engine instructions has all kinds of errors in it. Most are easy to pick out (instructions labeled as the wrong version of MIPS) but at least one instruction for sure has the wrong opcode. The tests against gcc for EE should pick those out at least.
January 29, 2016: Added Parallax Propeller to the assemblers / disassemblers. Haven't tested it yet. Hoping to add it to Java Grinder in the next couple weeks and get code running on a chip.
April 25, 2015: Progress is still going on here. Joe has added 65816 along with automated tests and rewrote the 6502 assembler. I've added automated testing for 68000 and I'm working on ARM.
Copyright 1997-2016 - Michael Kohn