Re: port-i386/58624: dosboot(8) fails to load kernel through eXtended Memory Specification API (XMS)

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

Hi Andrius, thanks for analysis!

On 2024/08/22 6:20, vezhlys%gmail.com@localhost wrote:
> however it seems to be broken for ages (likely after "Merge XMS 
changes from exec_fromdos.c" in this commit 
https://github.com/NetBSD/src/commit/e58bb7948317c81664b47ff2d86b21df13f69251), 
potentially worked back in 1.3.x releases.

When I cleaned up dosboot.com recently, I had the same impression.
I thought about trying PC DOS 2000 for sure, but I haven't yet
(probably never)...

Let us drop XMS support entirely. It has been broken over the
last quarter century (!!!), and we can safely assume there are
no user needs... As a bonus, we can unifdef some `XMS` blocks
outside dosboot directory.

Here, I note again that dosboot.com successfully works without XMS.
We can drop himem.sys nor himemx.exe from config.sys, or skip
config.sys itself. Then, we can use extended memory by ourselves.

Thanks,
rin