Pin 4 is "Head Load"
Pin 6 can be either "Ready" or drive select 4
Pin 10 is drive select for first drive.
Pin 34 is "READY", or "Disk Changed", or fourth drive selrct (TRS80)
BUT, IBM PC puts a twist in the cable (pins 10 - 16?), and does selection
by the cable with all drives jumpered to be second drive. Drive A: is
after the twist; drive B: is before the twist.
https://superuser.com/questions/849079/what-is-the-little-twist-in-this-floppy-ribbon-cable-for
So, at the very least, you will need to make up a cable.
possibly a straight cable, and jumper the drive as A: !
https://archive.org/stream/TNM_Sharp_PC-5000_portable_computer_-_Sharp_Elect_20180303_0200/TNM_Sharp_PC-5000_portable_computer_-_Sharp_Elect_20180303_0200_djvu.txt
says that CE-101F is a "System disk" (bootable)
--
Grumpy Ol' Fred ci...@xenosoft.com
On Wed, 25 Sep 2024, Steve Lewis via cctalk wrote:
I'll take that offer, thanks Van!
And in general, about this experiment:
Reviewing my notes when I last explored into this, a little over a year ago:
https://forum.vcfed.org/index.php?threads/sharp-ce-510f-disk-drive-looking-for-pinout-for-sharp-pc-5000-or-mz-80b.1242950/
It mentions: 360KB, 9 sector/track, DS/DD.
But also, it mentions a peculiar Sharp model number for disk media,
specifically "MS-DOS CE-101F"
I've so far been unable to find an image of their stock OS, and so I'm just
hoping/gambling some distro of either PC-DOS or MS-DOS might work.
And their interface on this is a 37-pin, but digging into that (see notes
in the link above) I think some of the pins used ended up being different
than the pin out described in the IBM manuals for the IBM 5150's standard
disk drive controller (that also has a 37-pin connector at the back of
it). By reading, it seems pin 4, 6, 10, and 34 were different (but I'm not
tech h/w savvy enough to deduce yet if it's just different ordering, or
truly different signals along the wiring)
One other thing - I think the PC-5000 on bootup (with the cartridges) I
recall it saying DOS 2.01 or possibly 2.11 - I don't have the machine near
me at the moment, but in a few days I'll be able to check again.
-Steve
On Wed, Sep 25, 2024 at 12:24 PM Van Snyder via cctalk <
cctalk@classiccmp.org> wrote:
Only related to the subject, not the body of the discussion:
I found a stack of 5.25" floppies for Norton Utilities. I don't have
any 5.25" drives. If you want the disks, they're yours for a PDF of a
shipping label for 8"x10"x1" 8oz. I have no idea whether they're
readable.
Van Snyder
2229 Shields Street
La Crescenta, CA 91214
