11 Jun
2009
11 Jun
'09
6:39 p.m.
On Thu, Jun 11, 2009 at 5:24 PM, Sridhar Ayengar<ploopster at gmail.com> wrote:
Even today, one of my favorite diagnostic tools is the
two-digit display on
the front of RS/6000s.
I haven't had the pleasure, but with so much time spent on various
models of Elf, I approve.
One of my favorite diagnostic hacks is Morse code messages blinked out
via the power LED on an Amiga. If the processor isn't totally wedged
and the hardware isn't so broken as to allow I/O port access, you can
get your message.
Rather low bandwidth, but huge portions of the machine can be borked
and it still works.
-ethan