On Tue, May 10, 2016 at 11:47 PM, Eric Smith <space...@gmail.com> wrote: > the Tektronix DAS 9100 logic analyzer is Z80 based, and > contains many ROMs, mostly 8KB MK36000 series masked ROMs and MCM68764 > EPROMs, but only one ROM appears to contain much actual Z80 code. That > 8K ROM is labeled "INTERP" and contains a bytecode interpreter. > Apparently all the other ROMs are full of bytecode. The bytecode does > not match the UCSD p-code nor the ETHZ P4 p-code. I've started > disassembling it, but haven't yet learned too much.
Volume 1 of the service manual confirms that most of the software in the DAS 9100 is written in Pascal and interpreted. Since the p-code doesn't match UCSD or ETHZ, I still suspect that it was compiled using the Pascal/8002 compiler from Pascal Development Co., but I'm not optimistic about finding a copy of that compiler or even the documentation for it. I enjoyed doing a little bit of reverse-engineering of the bytecode interpreter, but I don't think I'll pursue it any further.
