18 Oct
2024
18 Oct
'24
12:34 a.m.
Well, none of the bubble cartridges has a FORMAT.COM. There is MODE.COM,
CHKDSK.COM, EDLIN.COM, and then SYS.COM .
And trying to run FORMAT.COM from another DOS 3.30 on the PC-5000, it
actually does try to run, but then says "Incorrect DOS version"
We're trying another cut of the Sharp MS-DOS 2.11 image (the first one had
some issues). It has a FORMAT.COM, so hopefully that
will just work. If not, then maybe trying to extract an older FORMAT.COM
from a DOS 1.X image might be worth a try? I'm not too savvy
about boot sector stuff and DOS interrupts - maybe there is some DEBUG.COM
stuff that can help probe boot sectors of these bubble cartridges?
I'm not sure if I can borrow a DEBUG.COM from another DOS disks, will try
that also over the weekend.
-SteveL
On Thu, Oct 17, 2024 at 12:00 PM Sellam Abraham via cctalk <
cctalk(a)classiccmp.org> wrote:
On Mon, Oct 14, 2024 at 10:31 PM Steve Lewis via
cctalk <
cctalk(a)classiccmp.org> wrote:
All my bubble cartridges have MS-DOS 2.00, and one of the cartridges has
SYS.COM. So... I did a FORMAT /8 on another x86 system and formatted a
320KB disks. Then I put that disk into the PC-5000, then did a SYS C:
from
the bubble cartridge that has SYS.COM, and it
said "System transferred"
(and CHKDSK.COM agrees, there are 2 hidden files). I added COMMAND.COM
to
the disk, but it (the PC-5000) still won't
boot from that disk. I turn
the system off, remove the bubble cartridge, power on the system with
this
"new" 320KB disk inserted... and it
says WARNING: NON-SYSTEM DISK.
Is it possible to try formatting the disk from the Sharp PC-5000 itself?
It's possible there's something special about the boot sector on the bubble
carts. You might try reading the raw sectors off of it and examining the
boot sector to see if it's doing something special to allow it to boot,
then maybe copy that code into the boot sector on the floppy.
Sellam