pdp11 CPU on S100 board?
Given that old Soviet knockoffs of pdp11 cpus can be found on ebay, I was
wondering if anyone else has thought of making S100 boards containing said
processors.
--
David Griffith
dgriffi at cs.csubak.edu <http://www.classiccmp.org/mailman/listinfo/cctalk>
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
-----reply-----
Hi Dave,
I've been monitoring the S-100 PDP-11 CPU board thread and have a couple of
observations. I did not know the Russian clone PDP-11 CPU chips lacked
datasheets. This is a major problem but maybe surmountable with
prototyping. Also, I was very surprised to learn there are no free/open
source operating systems for the PDP-11 which would be required to adapt for
existing S-100 peripherals.
Apparently not even NetBSD is available which is stunning as it runs on
practically every CPU in some form AFAIK. The lack of free/open source
operating systems is a major problem since it then requires all the PDP-11
peripherals to be hardware compatible. As a result, either the entire
PDP-11 CPU with all peripherals fit on a single S-100 board or a suite of
dedicated boards would be needed. Neither scenario is realistic IMO.
The only remaining practical options IMO are to either write/port a
free/open source operating system to PDP-11 (an enormous task) or design an
S-100 board with FPGAs and blow in the whole PDP-11 design (CPU with
peripherals). The latter option rather defeats the purpose of using an
S-100 bus since you can't easily share other boards and it may be easier to
just make a PDP-11 SBC.
Sorry the S-100 PDP-11 CPU board project does not seem practical at this
time. However if anyone has ideas on how to resolve these issues and launch
a community project I would be glad to support as best I can.
Thanks and have a nice day!
Andrew Lynch
Hi! I've been ordering new and respin S-100 PCBs for the S100computers.com
and N8VEM builders.
There are several boards left over and available if anyone on CCTALK would
like to get some
I've noticed recently that some people do not want to "join" the project and
prefer to buy the PCBs on eBay.
This is a bit of a surprise but if their preference it is OK with me.
You can see the available boards here with links for more information.
http://shop.ebay.com/lynchkl/m.html
Thanks and have a nice day!
Andrew Lynch
ISTR someone looking for a vintage HP penplotter recently...
FYI: There is an HP DraftMaster II 36" pen plotter listed on CL (San
Francisco Bay Area) for $325.
steve
More free stuff for collection in West Yorkshire, UK if anyone is interested.
1) I have two Kennedy tape drives, not sure of the model number, but these
are the front loading 19" rack mount type. These are spooled tape drives.
Look to be in good condition, but I've never powered them on, so not
sure if they still work. Having two is useful (one for spares).
2) I have a couple of rack mount case style PDP 11 QBUS machines. These
are complete except for the disk drives(s) and the push on front plastic
surround (not sure what its called). They do have the control panel and
PSU though and a compliment of QBUS cards.
email me of list if interested in any of these. Thanks. Ian.
I just received two weird spam emails froom the list this morning.
One was a bounce from cctalk to my email address, obviously a cheap
attempt at forging headers that failed.
The second is just weird. Did anybody get it and figure out what's going
on?
I have a databook from National Semiconductor for the NSC800 family of
microprocessor stuff dated 1985. Free for shipping from California.
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
The results of your email command are provided below. Attached is your
original message.
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