I have thus patched open() and write() with a hex-editor. With the
attached ASM56000.TTP the compilation process runs through without
errors or crashes on Hatari's GEMDOS HD. I'll let Miro judge whether the
output is as expected.
Miro has compared its output and it is a perfect match for the same process run on real Falcon. Thank you very much for your investigation (even backed up by ancient source code!) and this binary.
Btw, while testing it I really felt sorry for all the people using this tool on their 16 MHz Falcons. Personally I had never used asm56000 for this very reason, qdsp was my all time favourite for all DSP coding. Now I'm happy that I can use asm56000 in emulators (or wine) for its precise error messages. How times change...