1 Mar
2022
1 Mar
'22
9:31 p.m.
i should also point out that lions would have had access to
a PDP 11/70 running with 4MB of main memory at
the Australian Graduate School of Management (where i worked
for a while after graduating). but i don’t recall him doing anything on that machine.
On Feb 28, 2022, at 3:27 PM, Andrew Hume
<andrew(a)humeweb.com> wrote:
the actual configuration of Lions’ PDP 11/40 was
128 Kbytes of core memory,
a DJ11 terminal multiplexor and
three RK05 disc units each,
but note that because of the way the machines were bought,
and because of addressing weirdness (the top 8KB were memory-mapped to I/O registers),
Lions’ PDP actually had 112KB of main memory.
the PDP 11/40 had 18bits of address space, so while processes were limited
to 64KB, the system could have had 256KB.