Is there any way to format MFM HDD (ST-251) with this controller?
Debug with -g=c800:0 and -g=c800:5 gives invalid opcode error.
Looks like regular 16-bit MFM controller, so no BIOS extension in C800 segment.
Use the LLF option in main BIOS if available, if not - eg. HDINIT.EXE from Checkit 3.0.
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Grzyb wrote on 2023-07-03, 15:20:Use the LLF option in main BIOS if available
Actually that is what I did in a first place. But on cylinder 250 it failed after few minutes of loud knocking sound. That is why I was looking for alternatives.
But today I gave BIOS second chance and everything went OK.
