On 29 Mar 2013, at 23:29, Cory Smelosky wrote:
Not extremely interesting all of you have probably seen this a million times before on
your own gear. ;)
But! I brought up a SIMH instance on my Raspberry PI, connected the console to my USB to
serial adapter, and used it to connect to MIM using my VT420. ;) I'll eventually use
a DECserver but for now this is what I have. ;)
http://gewt.net/pics/vt420-mim.jpg (apologies about the picture quality can't quite
keep my damn hands perfectly steady)
(also, my connection to MIM keeps dropping I need to figure out what the cause is)
To me that's the pinnacle of emulation. Connecting REAL peripherals to an emulator to
get close to the REAL experience. I did a bit of testing of Mark Pizz's serial port
code for terminals against my VT510 just because I wanted to be able to do real, direct
serial terminal work against an emulated VAX or PDP-11 and so I made sure it was tested
some so it got into 4.0. There's something rewarding about rattling away on a VT510
talking to a tiny board that draws a lot less power than the VT. :)
The RaspberryPi is great for lower-end VAX and PDP-11 emulation. It only musters about
1-2VUPs at best running the uVAX 3900 so isn't a huge deal faster than the early
11/7xx series machines. Still my Area router is a rev. 1 Raspberry Pi running raspbian and
SimH. It's been running 24/7 for almost a year :)
mark at raspi1:~$ uptime
03:46:15 up 54 days, 5:29, 1 user, load average: 0.23, 0.17, 0.14
We get occasional power outages (hence the short uptime) and I never got around to buying
a UPS (if my computer stack goes off I just grab a torch and read a book and wait for the
power to come back :P).
I have 2 more RasPi's in the 5.25" bays of a 2U unit now too, one that will be
running as a PDP-11/93 and one that will run as a VAX 11/780. They share the 2U with a
Atom D410MO motherboard that will run my VAX work machine (it's about 20x faster than
a RasPi). The thing is jury-rigged so the Pis run of the 5V line on the ATX PSU via a
Molex. It has a GBit hub inside and 2 NICs on the Atom board (alas only 10/100) that are
bridged so it only needs 1 ethernet port to attach the whole box. It's neat and save
for some soldering, I built it myself. I originally built it for hosting a VAXcluster but
I really have no use for one.
http://www.flickr.com/photos/pixel_mason/sets/72157630752112422/
Oh, incidentally, Gregg, the Optiplex is probably round that way so it keeps him warm at
his desk.
I have an ancient (well 2004-ish) P4 3.0 HT that I use for Windows XP 32-bit now I'm
on Win 7 64-bit (I have legacy hardware devices that don't have any 64-bit drivers).
It's a Dell Dimension 4600 motherboard that's been reboxed with a new case and PSU
with a cute ducted cooling fan for the P4 made of plasti-card, duct tape tape and a 120mm
fan. Which reminds me, I must put Pathworks32 on it this week :)
--
Mark Benson
http://DECtec.info
Twitter: @DECtecInfo
HECnet: STAR69::MARK
Online Resource & Mailing List for DEC Enthusiasts.