I am hampered by the facts that (a) this machine is
not at all common in
the UK, so I've never seen one and (b) I don't have schematics.
Tony, I've scanned the page that covers this section of the board. The
schematic is nice clear, BUT the file is a 20MB TIFF image. :)
http://www.simpits.org/~geneb/ampro_littleboard_cpu1b_2_of_3.tif
According to the list on the last schematic page, -12V is only present on
two pins. The output on the DC-DC converter, and pin 1 of the 1488.
tnx!
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.