[cctalk] Re: [List] Re: Fun with PDP11 Assembly Language

[Paul Koning via cctalk]

> On Sep 13, 2025, at 12:59 PM, ben via cctalk <cctalk@classiccmp.org> wrote:
> 
> On 2025-09-13 10:35 a.m., Milo Velimirović via cctalk wrote:
>>> On Sep 13, 2025, at 10:49 AM, Bill Gunshannon via cctalk 
>>> <cctalk@classiccmp.org> wrote:
>>> On 9/11/2025 4:30 PM, Jim Davis via cctalk wrote:
>>>> You can get an emulated 11/23 running 4.2 BSD for $3.00. That's crazy.
>>> 
>>> Can you tell me where?  With that glaring error I am really
>>> interested in learning more.  Google finds nothing with those
>>> terms.
>>> 
>>> bill
>> It has to be hyperbole.
>> No pdp11 ran 4.x, the best you can do is 2.11— which is still being patched 
>> and maintained; see the pidp-11 mailing list. Probably not $3.00, but $30.00 
>> will get you a sytem on a DIP package that will emulate most anything. Spend 
>> a bit more for a Pi4 or Pi5 if you want to drive a PiDP-11.
> 
> But can you still get a real PDP-11 replacement for driving vintage hardware?

Probably not.  But I think John Wilson of Ersatz-11 fame created a Unibus (or 
QBus?) interface for PCs so E-11 could drive real DEC peripherals.

Given suitable transceivers, it would not be all that hard to create a PDP-11 
replacement with Unibus and/or Qbus capability out of an FPGA.  There are 
working PDP11 emulations for FPGAs.

        paul