Which means that there is at least one machine with a
complete set of
microcode and higher layers avaliable.
Great news!
with at single RS232 channel, no software and a flat
directorystructure
with over 500 entries, this looks also to be quite a task.
By 'no software' do you mean no development tools?
If there is some way to type out the contents of a disk block, you can
slowly dump the whole disk. Binary dumps of all the files could be automated
if there is a file dump program.
It does have ethernet, but it is the very old ( first
?) 3MB standard.
The orig was roughly 3mbits, with 256 device addressing. The specs for what
PARC developed exists, though I'm not sure that they exactly copied the design
having never seen it.