please create a folder "dec100b", because i can't...
I recently uploaded the Z80 disassembly (from February) to the repository available under https://github.com/shattered/retro-bios.
The binary for that code can be found at the end of the upper, language specific ROM.If a Z80 guru has a look at it, i'd be happy. I still think the code tries something weird we don't emulate.
At times, the Z80 controls the 8088 (CP/M) and sometimes it's the other way round (DOS). So it's not a strict master-slave relationship.
It could also be a much simpler problem with floppy emulation (overruns when writing because of unemulated WAIT states), who knows?