10 Dec
2019
10 Dec
'19
12:04 p.m.
Downloaded files for previous PDP-11 emulator but couldn't get it to
run. Link to German site at bottom of your post works fine and Unix
runs about same speed that it ran on my 11/34 in 1983. Scary that
coding a PDP-11 emulator in an incredibly inefficient scripting
language such as Javascript matches speed of the machine I was using
back then. That slowness just applies to Unix; all of my code back
then was written in PDP-11 assembler which allowed data sampling at
20 KHz from A/D and essentially bypassed most of RT-11 to get
speed. Will play around more with this emulator when have time.
Unfortunately, a lot of people now seem to think that Javascript can
be used to code large projects such as the provincial system which
allows one to access patients reports and lab results from whole
province; my comment to them was that it does a great simulation of a
paper chart but also emulating a sloth with a fondness for
barbiturates turning chart pages made it essentially useless.
At 10:51 PM 12/9/2019, Jay Jaeger wrote:
No, not necessarily. A web server provides a
content header based on
its own internal configuration. For local files, it is determined
locally, and so might be different.
Also it is possible that there are some file references in there that
are not purely relative or that there is another file that is not there.
One would have to look at the .html and .js files to see.
The code looks pretty flat; no folders. It didn't even need any
tweaks for file permissions when I uploaded to a web server. The
HTML mentions two .js files fpp.js and vg11.js that aren't present
on his web or in the zip, but it runs without them. It's not trying
to write back to the DSK files, it just keeps an in-memory cache
when it's running. I imagined it was something related to security
in a local browser.
I tried emailing the author but no response yet.
<http://pdp11.aiju.de/>http://pdp11.aiju.de/ seems to be a
different, simpler PDP emulator
written in JavaScript.
- John