PDP2011 board

ben bfranchuk at jetnet.ab.ca
Fri Oct 23 00:09:11 CDT 2015

On 10/22/2015 10:54 PM, Don North wrote:
> On 10/22/2015 9:27 PM, ben wrote:
>> 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
>> Ben.
>> 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 chip
> Wow. What can I say. AHDL. I never used that even when it was current.
> Proprietary to Altera. All of the warts of VHDL with none of the benefits.

Both Verlog and VHDL leave me puzzled just how they work as logic
black boxes. AHDL I can figure out how to pass parameters.

> For PDP2011 direct compatibility then the path of least resistance is
> probably
> the DE0-NANO with CycloneIV for $79. I have several; nice little boards
> for experimentation.
> You can get it from Adafruit ($99) or Digikey as well. Direct from
> Terasic has high shipping cost.

A quick look at the PDP2011 site says that is it is too small
for the optional PDP 11 features.

> And if you are going to learn an FPGA development language look at
> SystemVerilog/Verilog,
> OpenCL, or VHDL. Certainly not AHDL. It was bad even when it was new. It
> does not get better with age.

I'll go back to schematic entry before I touch them.
They FUCK!

> Don

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