Re: Regression: cannot boot the real thing from floppy

Hello Paul,

Sounds good, because if you see "MINIX boot" message when booting fromyour HD/CF, and if you can mount it when booting from the floppy, itmeans there are only a few changes left to make it fully working.Did you tried to hack the 3 variables 'sect_max', 'head_max' and'track_max' in 'elkscmd/bootblocks/minix_first.S' with the geometry aspresented by your adapter (123 / 16 / 6) ?Also, in 'elkscmd/bootblocks/minix_second.c', the boot drive number isforced to 0 when calling 'disk_read' (as first argument), so the MINIXboot loader has to be improved to use the right one provided by theBIOS. Meantime, you can also hack that file and set that argument to0x80 (= first hard drive) for you experiment.

MFLD
Le 15/04/2019 à 18:12, Paul Osmialowski a écrit :

Just one more observation. I managed to mount minix filesystem from CF
Card on system booted from 360k floppy! And not using directhd driver at
all! My mistake was, I tried to mount /dev/hda1 while the partition is at
/dev/bda1
I've noticed, chroot command would be a great help.
Cheers again,
Paul
On 2019年4月15日, Paul Osmialowski wrote:

Hi Marc,
Thanks for your response. I've noticed a few interesting things btw.
I've found lots of #ifdef HARDDISK in this new boot sector code, so I
decided to give it a try. I've placed this boot sector code in
/dev/hda1 (leaving original FreeDOS MBR in /dev/hda) and for a first time
I've noticed something is alive: "MINIX boot" appeared on screen when I
booted from CF Card! But that's all, the next thing it tried to do was to
access floppy disk drive, having it empty, I could only see "Press key"
and it rebooted itself after pressing any key. I guess my XT-IDE card is
not handled properly, although when I boot ELKS from floppy I can see this
on the serial console:
hd Driver Copyright (C) 1994 Yggdrasil Computing, Inc.

Extended and modified for Liux 8086 by Alan Cox.doshd: 2 floppy drives and 1 hard drive/dev/hda: 123 cylindrs, 16 heads, 6 sectors = 60.5 Mb

(that's when 64MB FreeDOS CF Card is inserted)
Also, before the ELKS boot starts I can see this:
XTIDE Universal BIOS (XT) @ C800h
Master at 300h: CF Card
Slave at 300h: not found
I've tried to compile directhd driver, but it lacks #include <arch/io.h>
causing link-time issue as some of the macros defined there are mistaken
for functions (outb_p() and friends), adding missing #include <arch/io.h>
makes whole thing buildable, yet it still doesn't seem to make any
(visible) difference.
Cheers,
Paul
On 2019年4月14日, Marc-F. Lucca-Daniau wrote:

Hello,
Not a surprise, as the new code has only been tested on 1.44 MB floppy.
Looks like there is a missing "#ifdef FD360" in the boot sector new code...
Now tracked by issue https://github.com/jbruchon/elks/issues/253
Thanks for the report,
MFLD
Le 14/04/2019 ? 19:46, Paul Osmialowski a écrit :

Hi,
I'm having access to my old XT for next couple of days so I decided to
give the latest ELKS a go. Since I still don't know how to boot it from
CF-IDE card (I can boot FreeDOS from it), I'm still booting it from 360k
floppy. Unfortunately, nowadays it only prints MINIX and reboots itself
after a while.
I managed to make it boot again after reverting following commits on
master:
93b57f474cb0e3fa9917b4783781cd405c944b04 [libc] Data segment starts with
nil data
9e038b816014f83c0808df1ee5697380cd6be499 Revise bootblocks for GCC-IA16
(the first one is reverted mostrly to reduce conflicts when reverting the
other one).
I guess something went wrong with implementing new features.
Cheers,
Paul