Gregory Haerr

@swausd Thanks for your debugging! It would seem you have accurately identified the problem, as well as the fact that ktcp ignores ACKs received without data (which I'm now learning...

> after the 100. DUP ACK my ELKS system sends a retransmit of the missing packet, then my PC sends ACK seq=77. I am assuming that the (first) ELKS packet...

Perhaps try copying floppy to floppy (instead of hard disk) or to same floppy to make sure problem isn't the hard disk driver or differing sector sizes.

Hello @tyama501, There shouldn't be any explicit difference in the driver between INT 1F and LOADALL, they are both handled underneath the xms_fmemcpy function call. We can take a deeper...

Hello @drachen6jp, Wow! Very nice catch on incorrect registers being setup in loadall routine!!! What is most surprising to me is that this ever worked in the first place, since...

Hello @drachen6jp, > What is most surprising to me is that this ever worked in the first place After studying a bit more, I think the reason it worked with...

> fsck-dos.os2 after copying files from fd1232 to hda1 on Neko. It would be interesting to see the results of fsck-dos.os2 on hda1 damaged by LOADALL problem on real hardware...

> [good news] I could install and copy files using LOADALL when #hma=kernel xms=on That is good news, so @drachen6jp's LOADALL fix is working. > [bad news] It still get...

> First of all, here is the fsck-dos.os2 result requested by @ghaerr of the broken files. Does the fsck modify the boot block signature? It says so after running it...

> once I have gotten A20 LINE ERROR (hardware message from PC-98). It is curious that PC98 BIOS has error message for A20 line error: this would seem to me...