On Sun, Jun 4, 2023 at 10:57 PM Fred Cisin via cctalk <[email protected]> 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
