TMS57070

Tools & docs for the TI DSP TMS57070 including IDA disassembler

Documentation

See the wiki tab

IDA processor module

TMS57070_disasm.py

• Install in IDA_dir/procs/
• Developed for IDA 7.0/7.2
• Not complete - currently missing:
  • Some addressing modes
  • Some opcodes (to be implemented)
  • Some opcodes (to be discovered)
• Issues:
  • Data references are basically broken. They don't point to the right place in memory (PMEM rather than CMEM or DMEM) and don't track read/write properly
  • CMEM loading from file is partially broken. IDA doesn't fully understand the idea that this segment has a different word size (3 bytes vs 4 bytes for the code section)
  • If a loop is broken (by undefining code), the loop instruction (or last instruction of the loop) may need to be re-analysed to restore the loop
  • Some indirect address incrementing modes cannot be displayed (such as incrementing the DMEM pointer when the instruction doesn't read/write to DMEM)
  • Auto-comments spam the output window with errors. But hey, at least you get auto-comments (no thanks to IDA's poor documentation)
  • Reloading the input file is broken. IDA ruins the database in the process, but doesn't actually load in the new data.

Emulator

• Developed in Visual Studio 2019 as a console project
• Pretty good accuracy and support
• Tested against the real hardware in an automated process
• Main omissions:
  • Some XMEM functionality
  • Some flag functionality
  • MACC accuracy with large numbers
  • Good command line interface
  • A readme!
• WAV file input and output courtesy of https://github.com/audionamix/wave
  • MIT license in the main file "wave/file.h"