sdcdb works only with s51.exe - by default

[dzid26]

Some manuals like https://github.com/pfalcon-mirrors/sdcc/blob/master/sim/ucsim/README make a impression sdcdb can work with any ucsim emulator.
But when I tried -m option (e.g sdcdb -mz80) , it did change the emulator when inspected with !conf

[dzid26]

I found out sdcdb uses s51 subprocess. I was able to switch sdcdb to stm8 by renaming ucsim_stm8.exe to s51.exe