[cctalk] Re: Getting floppy images to/from real floppy disks.

5 Jun 2023

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 Message: 21
Date: Mon, 5 Jun 2023 04:35:28 +0100
From: Tony Duell &lt;ard.p850ug1(a)gmail.com&gt;
Subject: [cctalk] Re: Getting floppy images to/from real floppy disks.

On Sun, Jun 4, 2023 at 10:57 PM Fred Cisin via cctalk
&lt;cctalk(a)classiccmp.org&gt; wrote:
>
> On Sun, 4 Jun 2023, Rick Bensene via cctalk wrote:
 <> > an example of early "mobile computing". (Tongue firmly in
cheek).
...

 The original Osborne 1 had a 12V power input!

Actually it's +12.6V and +5.6V and you have to supply both voltages.
It's one diode drop to the +5V (logic supply) and +12V (DRAM, disk
motors, monitor supply), the -5V for the DRAM is produced on the logic
board.

I am told it was never used and that the Osborne battery pack came
with an inverter to provide 110V AC.

-tony

It (the Osborne Powr-Pac (tm) ) has a what the manual says is a DC-DC inverter that
plugged into a Gould lead-acid battery (or the cigarette-lighter socket in a car) at one
end and the AC input of the Osborne 1 at the other. I have read on this list that Lee
denies that OCC ever sold them, but I have one that I bought for $50 at Compumat in
Chicago on October 10, 1983 -- I still have the unit, receipt, and User Registration card.
It came with a glossy-printed grey-and-blue manual, like other contemporary OCC
products.

If anyone wants a copy, I can email you a PDF scan of the user manual.

Bob

2024

2023

2022

[cctalk] Re: Getting floppy images to/from real floppy disks.