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open-simh.simh/PDP11/pdp11_cpu.c
Mark Pizzolato 4064cc079a This fixes the problem that MMR1 is recording changes to R7 (PC), which it should not. (issue #44) 
It does not fix the problem that MMR1 is not used for floating point instructions.

I don't know if I will fix the FP MMR1 problem. It does not seem to impact running software. It is consistent with the architecture spec - just not with the actual J11 implementation. The J11 microcode has a variety of exception exits for FP conditions, and I have to trace which ones invoke fix-up, and which do not.
2013-06-02 06:52:32 -07:00

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