PDP2011 board

ben bfranchuk at jetnet.ab.ca
Thu Oct 22 23:27:43 CDT 2015

On 10/22/2015 9:44 PM, Don North wrote:

> I have one of the DE1 CycloneII device boards and at this point that
> family (CycloneII) is a bit old.
> If you can get it really cheap (<<$50) go for it, but the last Altera
> toolset that supports CycloneII is v13.0sp1 (v15.0 is current).
> I have moved most all my new experimentation on to the CycloneIV and
> CycloneV family devices.

Well just give him your unwanted DE1 card (or sell it to him)
The GOTYA on the PDP11 stuff is it still uses the old SDC card
format 1GB or less.

> If you plan to use a board going forward for some time, the newer
> CycloneV based boards are a better choice:
> http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=13&List=Simple#Category167

If I said what I want to say about that
I would be banned from the list for foul language.

> In particular the DE0-CV has a lot of nice features for implementing a
> PDP-11 ($150):
> http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=167&No=921&PartNo=1

Too small and for some reason I can't get a keyboard to work with it.

> Or if you want to go light on the hardware design and lean more on
> embedded software, the DE0-NANO-SOC  board ($99):
> http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=167&No=941

More fowl language comes to mind! I don't see any AHDL code
for using the dynamic ram. You mean I have BUY that code.
I think AHDL is cleaner to program in than the other options.
Is program the right term for hardware?

> At this point I would stay away from CycloneIII or CycloneII boards
> (unless you can get one very cheap) as the tech is older.

Sometimes older is better. They dropped both async set and clear from the
flip flops and just left clear. That is a BUG not a feature in my mind.
[sarcasm] wait Verlog and VHDL only use latches [end sarcasm]

> Don

Back to building a nice LS TTL computer in a FPGA.
Any one know the time the 74LS382 came out. The TTL data
book says Jan 1981/revised march 1988 for S and LS chips?

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