title Trying to boot an Osborne 1
user strick
ip 75.144.20.99
vol 1
lock ********

2020-12-05: Trying an
/link https://en.wikipedia.org/wiki/Osborne_1 Osborne 1
with a fresh boot disk.

I bought a lot of
/link https://www.ebay.com/itm/Osborne-1-1A-System-bootdisk-5-DISKS-CP-M-Games-ZORK-1-2-3-System-Diagnostic/332635909348? 5 floppies
on EBay.
They arrived from the Netherlands.
Four are supposed to be Double Density, and one Single Density.

We don't know for sure if this is a single- or double-density
computer.  Recently it did boot, and it did work, including
the little built-in display, but we thought the boot disk was
damaged, so we got another one.

Also the built-in display seems to have stopped working,
but the Composite Video output is good.
You can see where I checked it on my oscilloscope
before plugging it into the Composite Video input on my big TV.

However it doesn't want to boot from any of the five disks,
neither the single- nor the double-density.

If I insert no disk, I get "BOOT ERROR".
If I do insert a disk, I get "DISK IS NOT A VALID SYSTEM DISK".

If you've got another disk I could try,
write me in the domain "yak.net" as user "strick",
or contact me W6REK over N6NFI/R.

/section Hints:
* https://www.richardloxley.com/2018/04/17/osborne-restoration-part-11-floppy-controller-debugging/
* http://www.retroarchive.org/maslin/disks/osborne/index.html
* https://retrocomputing.stackexchange.com/questions/6187/availability-of-5-25-floppy-emulators


/imagefile PXL_20201206_000351799.jpg

/imagefile PXL_20201205_234133434.jpg

/imagefile PXL_20201205_234233009.jpg

/imagefile PXL_20201205_222610311.jpg

/imagefile PXL_20201205_222717856.jpg

/imagefile PXL_20201205_232934