FDD Support Based on ao486 Implementation

[spark2k06]

FDD does not work properly when using 8086bios with PCXT_20230120.rbf or later release versions.
The point of change from PCXT_20230114 to PCXT_20230120 should be investigated.

UPDATE:
This issue seems to have occurred since commit c063a5635c7137a9b495f2f54237e53b31093ef1.
https://github.com/MiSTer-devel/PCXT_Mi ... 3b31093ef1

I am not sure why, but I set Hercules Graphics to "No" and it (DOS setup) works now.

That's what I was going to say, that I didn't know exactly how the problem was reproduced. Tested with micro8088 BIOS and the latest version:

micro8088_bios.jpg (121.81 KiB) Viewed 4746 times

[spark2k06]

This is the configuration I have set up:

Video_Config.jpg (161.9 KiB) Viewed 4742 times

[kitune-san]

Perhaps it is an issue that occurs when booting with the setup disk and transitioning to the setup screen.

[spark2k06]

Perhaps it is an issue that occurs when booting with the setup disk and transitioning to the setup screen.

Can you make a short video showing the problem with FDD?