>Matthew Geier wrote in message <6i610n$d67@metro.usyd.edu.au>...
>> State Rail is still rather dependant on route setting computer logic
>>implemented on DEC PDP11 systems.
>Surely not still using PDP11 systems still ! According to my info the PDP11
>is a 16 bit machine introduced in 1970 (ie when steam was still around) and
PDP 11s (Now a single board computer) are still common in industrial
control. DEC dont make them any more, but there are number of other people
who make PDP11 compable SBCs for industrial use.
If your genuine PDP 11 packs it in, you rip out the CPU cards and pop in
one of these 3rd party CPU cards , boot up and keep going.
Code was written in assembler back when these were popular. Makes the
system hard to migrate with out total re-engineering of the system.