Re: Likely opcode execution bug

22.08.2021 18:19, Volker Ruppert:
>> I think I'm observing a bug in the execution of the following
>> instruction (in 16-bit real mode):
>>
>> mov dword ptr cs:[si+3], 0x0104d041
>
> Please verify the behavior of this instruction with the latest Bochs
> version 2.7.

I'm trying 2.7 now, but from the first glance it looks like things got 
worse: execution does not even reach the test point anymore, it hangs 
somewhere earlier. Probably it'd be good to find what's the new problem 
appreared in 2.7, but it will take some time. The code I'm running 
inside is certainly messy and it might well be that some bochs 
improvement broke it.

Meanwhile, ideas on how to debug the execution of this "mov dword ptr 
cs:[si+3]" are still very welcome (in case the problem was not fixed 
between 2.6.11 and 2.7).

Thank you,

Regards,
Nikolai

>
> --
> Thanks,
> Volker
>