There is more to the disks. (My serial number is D0029.)
For those without a real harddisk, C: is an array of Flash eproms that can
be written with an utility from the service disk. It is R/O to the normal user.
B: is the lithium buffered cmos ram for user results and calibration factors.
I also get the message that the HD controller is broken. But when I boot
from floppy, I can see the contents of C: , so this seems to be more a
driver issue. I cannot boot completely into the measurement program.
All floppies must be dos6.22. Everything else seems to produce
wrong_version errors. Some .com and .exe and .sys files are incompatible
when taken from different dos versions.
I replaced both the Renata Lithium battery and the Dallas Li buffered real time
clock and managed to erase b: during that, should not do that in the night.
I then tried to set the clock and disk type in the Dallas chip. I could find the required
disk type nowhere in documentation. I finally restored the original Dallas chip,
and it seem not to be completely empty.
It contained HD type = 8, which is
Cyl 995 heads 14 WPCOM 65535 LZONE 995 sect 17 Size 116 MB
Funny enough, the old Dallas had the same time that I set with the new chip,
but I think I must not understand everything. In NIKGEROS' case, the
Dallas chip seems to be empty because it has forgotten the date/time.
I could not get an original Renata battery in time, so I cracked the old one open
and soldered wires to the leads of the carrier. Don't solder directly to a Lithium
battery that does not have wires or tabs, that might result in a thermonuclear surprise.
I used a 2/3 AA cell with wires, ugly but works.
Sometimes, I also get the display with the zebra stripes from the first post,
so this is not a hardware malfunction. Also, my reconstructed boot disk has a
problem with the display window size. I cannot see the bottom line, so typing
commands is a royal pain.
The Wandel&Goltermann fan group on groups.io seems to be dead.
I see there abt 3 posts, and my test post never showed up.
cheers, Gerhard