28 Jan
2015
28 Jan
'15
4:36 p.m.
I am rather sure the cpu was left. But you really need additional bits in the par as well
as actually addressing the extended memory. I probably should try to find the
documentation for exact details here then. I might be able to track down the machine, but
I haven't seen it in almost 20 years.
Johnny
Eric Smith <spacewar at gmail.com> skrev: (29 januari 2015 01:28:31 CET)
On Wed, Jan 28, 2015 at 3:13 PM, Johnny Billquist
<bqt at update.uu.se>
wrote:
--
Skickat fr?n min Android-telefon med K-9 E-post. Urs?kta min f?ordighet.
So, it also implies that the original MMU have to
be removed. And
that is
where you put the new card in.
The PDP-11/34 "original MMU" is part of the base CPU and is not
separable. Upgrading an 11/34 to 22-bit addressing would require
replacing at least one or possibly both of the CPU cards with
something else, in which case technically it's no longer an 11/34.