Re: Reviving Spock

[Roger Johnstone <news2006@roger.geek.nz>]

In <UeWdnVneJIWh29zZnZ2dnUVZ_s-dnZ2d@comcast.com> Michael J. Mahon wrote:
> 
> If a supply is missing the -5v line, it is easy to add one by using a
> linear regulator (7905) to regulate the -12v down.  The actual current
> drain on the -5v supply is almost negligible, so this is an easy mod.

This is what the Apple IIc does. The internal switching converter 
produces +5V, +12V and -12V and a 7809 regulator on the IIc motherboard 
is used to generate the -5V supply.

-- 
Roger Johnstone, Invercargill, New Zealand
http://roger.geek.nz/
________________________________________________________________________
  No Silicon Heaven? Preposterous! Where would all the calculators go?

              Kryten, from the Red Dwarf episode "The Last Day"