On 4/23/06, Gooijen, Henk <henk.gooijen at oce.com> wrote:
Hmm...
depending on which memory controller you have (likely to be
either the 8MB max or 12MB max)...
Thanks for the extra info, Ethan.
I need to do some reading up on the VAX-11/7x0, but AFAIK, my machine
has seven 1 Mb boards installed.
I don't recall seeing an 11/750 with a newer controller that didn't
also have one 4MB board (there are 8 Unibus-shaped slots for "CMI"
memory in an 11/750), so to hazard a guess, you have the most common
model - 8MB max physical memory.
It's probably worth it to look for another memory board. The 11/730
and 11/750 share the same 1MB board - a mass of 4164s, or, in the case
of some 3rd party memory, a couple of rows of 41256s.
I will also have to figure a way to get the OS
installed, as I only have the
VAX with three RA81's connected to it. I have a microVAX 3900 which
has a Kennedy 9610, but the interface is QBUS :-(
In my experience, we always used a SA Backup TU58 set (number of tapes
depends on the version) then installed from 9-track. If you could put
an RA81 on a Qbus machine (need a KDA50, IIRC), then you could restore
the save set onto the RA81 and then boot it on the 11/750.
I posted a request for Zork (PDP-11) on Amazon a year
ago, but
never had any response. So, your link to the VMS version is great!
I remember seeing "Planetfall" for RT-11 on the wall of the local DEC
shop, but since I couldn't afford a PDP-11 in 1983, there it stayed. :-(
I have Planetfall and Leather goddess of Phobos (IIRC), but they are
for the ATARI.
The datafiles are all portable from any one platform to any other platform. The
only thing that gets tricky is that with a lot of the 8-bit micros,
Infocom had to
chop up the the data file and put it on a diskette as raw blocks (C-64 and
Apple II, for instance), with a platform-unique mapping.
I once tried Zemu in RT-11 in SIMH :-) but I missed
the correct library to get the OBJs linked. Never finished it.
Fun.
With a Z machine you can run Planetfall, etc. Just
need to copy the data
(that's what I have heard/understand) ...
Exactly so. With "modern" machines (more than 16-bit address space - UNIX,
VMS, classic Mac, PalmPilot...), it's easier to write a Zmachine that buffers
the entire game file in memory rather than do a read-only demand-paged
scheme as the 8-bitters did (and still do - I helped Mike Riley, author of ElfOS
write a Zmachine for the 1802 last year - plays v3 games great on a 32KB Elf).
With these games we have a good reason to switch the
old machines ON more
often than just once a year :-)
Heh... well... a good reason, but you can play with a pair of AA
batteries on a PalmPilot - much less energy than an entire 11/750
w/3?!? RA81s... that's a lots of kWHs.
-ethan