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by jamesMPi
Wed Aug 14, 2019 9:25 pm
Forum: User groups and events
Topic: Anyone in Connecticut?
Replies: 2
Views: 3537

Re: Anyone in Connecticut?

old thread any PI users getting online at least

I want to to Open VMS

means I have to get SIMH running

also my Pi 3 B 1gb RAM seems to Freeze A LOT its less than week old
by epoch1970
Wed Jun 19, 2019 8:25 am
Forum: Advanced users
Topic: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?
Replies: 4
Views: 311

Re: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?

Bridge members do not have an IP config. You can remove the dhcpcd.conf entry for eth0 and reinstate denyinterfaces instead.
by alanfleming
Wed Jun 19, 2019 7:47 am
Forum: Advanced users
Topic: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?
Replies: 4
Views: 311

Re: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?

It wasn't the emulated machine. It was indeed the Pi. Take-away here is on choosing an IP address for an emulated machine in SIMH, do not configure it in the Pi Working config: /etc/network/interfaces: auto eth0 iface eth0 inet manual auto tap0 iface tap0 inet manual pre-up tunctl -t ...
by Ernst
Tue Jun 18, 2019 6:28 am
Forum: Advanced users
Topic: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?
Replies: 4
Views: 311

Re: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?

So br0 with an ip address, and nothing else with one. Routing table looks as you'd expect. The routing table would be very interesting but you did not show the contents. From the pi, I can ping both inside and outside the network. From an emulated machine attached to tap0, I can only ping devices o...
by epoch1970
Tue Jun 18, 2019 12:10 am
Forum: Advanced users
Topic: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?
Replies: 4
Views: 311

Re: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?

The bridge looks like it is working since eth is working. Could be user access rights on tap. Try -u root with tunctl. Using something less complicated than an emulator to validate that network setup could be an idea, also. (tunctl and ifconfig and brctl are antiquated by "ip" commands -although brc...
by alanfleming
Mon Jun 17, 2019 9:53 pm
Forum: Advanced users
Topic: Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?
Replies: 4
Views: 311

Cannot bridge eth0 and tap0 for SIMH - can't ping default gateway or beyond?

I'm trying to get bridged networking up and working on a copy of Stretch downloaded yesterday, for use with SIMH. My problem is that while I can ping by IP address anything locally, I can't ping my default gateway or anything beyond it. I've followed the up to date advice on ...
by ejolson
Fri May 10, 2019 5:23 pm
Forum: Other programming languages
Topic: ScriptBasic
Replies: 1374
Views: 54679

Re: ScriptBasic

... thing with Eclipse. For the record, the original binaries for HP2000 Time Shared Basic are freely available and will run on the Raspberry Pi under SIMH. It is, however, a bit difficult to boot as there are timing issues that weren't present in the physical hardware related to synchronizing the ...
by ejolson
Fri Apr 26, 2019 5:24 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 2312
Views: 111887

Re: Why Avoid BASIC on RPi?

... of the existing Basic Fibonacci codes could be adapted. Since VAX Basic is compiled, maybe it would still run fast enough on the Raspberry Pi in SIMH.
by ejolson
Wed Apr 24, 2019 2:50 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 2312
Views: 111887

Re: Why Avoid BASIC on RPi?

... in the backups and you have to compile your own from the src directory to get proper timings. You can also run Unix R7 on the Raspberry Pi under SIMH following these instructions. Everything used is open source. If I'm not mistaken, the R7-compatible bc Fibonacci code still runs under GNU bc ...
by JQW
Mon Mar 18, 2019 11:37 am
Forum: Advanced users
Topic: EMULATION HELP REQUEST
Replies: 13
Views: 974

Re: EMULATION HELP REQUEST

... maintained anymore, so NAT is unlikely to appear in the future. However I had success using slirp instead, and it's very easy to get working in SimH. You just need to attach the network adaptor to the NAT: device, e.g. attach xu nat: Substituting the relevant device name if necessary. SimH will ...
by wyan
Thu Feb 28, 2019 10:18 pm
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3520
Views: 105483

Re: STICKY: Introduce yourself!

... done some fiddling with them in the past. After a long pause I've started to play with them again, with an interest in emulation of old micros and simh, and maybe learn some assembler. Also building a NAS, probably :) Cheers!
by JQW
Tue Feb 12, 2019 10:33 pm
Forum: Advanced users
Topic: EMULATION HELP REQUEST
Replies: 13
Views: 974

Re: EMULATION HELP REQUEST

... address to this new network device. Then you need to configure your emulator to use the tap0 device, binding it to the newly created socket. With SimH the syntax is something like: attach xq vde:/tmp/switch1 depending on the network device name for the particular simulator being used. This will ...
by popeyeotaku
Tue Feb 12, 2019 3:51 pm
Forum: Advanced users
Topic: EMULATION HELP REQUEST
Replies: 13
Views: 974

Re: EMULATION HELP REQUEST

I can use port forwarded terminal emulation in SimH, but not in KLH10 which is required by TOPS-20. KLH10 expects to be on a dedicated ethernet connections (TOPS-20 survived into the era of TCP/IP and ethernet cables; therefore, it implements these ...
by JQW
Mon Feb 11, 2019 8:45 pm
Forum: Advanced users
Topic: EMULATION HELP REQUEST
Replies: 13
Views: 974

Re: EMULATION HELP REQUEST

... up elsewhere. If you just want to access a device remotely, then most simulators allow you to multiplex terminal devices via a telnet port. In the SimH PDP-10 emulator, for example, the ATTACH DZ {port} command will attach the DZ terminal multiplexer device to a relevant TCP port. I've not done ...
by JQW
Sat Feb 09, 2019 3:21 pm
Forum: Advanced users
Topic: EMULATION HELP REQUEST
Replies: 13
Views: 974

Re: EMULATION HELP REQUEST

Both klh10 and SimH support the MIT Chaosnet adaptor of the PDP-10. This was an early network interface developed at MIT during the mid 1970s. SimH allows you to bind Choasnet to a UDP port - klh10 does the same, but also allows ...
by ejolson
Fri Feb 01, 2019 7:00 am
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 2312
Views: 111887

Re: Why Avoid BASIC on RPi?

... weights can be loaded into a compatible neural network and run in much the same way that a Z80 Mandelbrot binary can be executed by the SIMH Altair emulator, there is a notable difference: The Mandlebrot binary can be disassembled if necessary, whereas the dog detector represents a new ...
by ejolson
Sun Dec 30, 2018 1:54 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 2312
Views: 111887

Re: Why Avoid BASIC on RPi?

... program is really compatible with the versions of BASIC which ran of the 8-bit microcomputers of the past, I downloaded the current version of SIMH, compiled the MITS Altair 8800 simulator and loaded extended disk BASIC. The results were $ ./altair Altair 8800 simulator V4.0-0 Current git commit ...
by pbnelson
Tue Dec 25, 2018 5:50 am
Forum: Advanced users
Topic: Historic Unix R7 using SIMH
Replies: 17
Views: 5769

Re: Historic Unix R7 using SIMH

Looks like this guy has everything you need for installing BSD 2.9 on a PDP 11/70 under SIMH, including instructions and a source "tape". http://gunkies.org/wiki/Installing_2.9_BSD_on_SIMH p.s. I'm super envious of the PiDP 11/70 kit. I sure wish I was building one ...
by W. H. Heydt
Tue Dec 25, 2018 5:14 am
Forum: Advanced users
Topic: Historic Unix R7 using SIMH
Replies: 17
Views: 5769

Re: Historic Unix R7 using SIMH

... was running on them in the early '70s...bsd 2.9. That's another option. Have you tried BSD 2.9 on Raspberry Pi using the PDP-11 simulator in SIMH? Sigh... No, I haven't. But then, I don't have a copy of bsd 2.9 lying around.
by ejolson
Tue Dec 25, 2018 12:40 am
Forum: Advanced users
Topic: Historic Unix R7 using SIMH
Replies: 17
Views: 5769

Re: Historic Unix R7 using SIMH

W. H. Heydt wrote:
Mon Dec 24, 2018 5:53 am
Since you were emulating a PDP 11/70, it would be appropriate to use what Berkeley was running on them in the early '70s...bsd 2.9.
That's another option. Have you tried BSD 2.9 on Raspberry Pi using the PDP-11 simulator in SIMH?
by ejolson
Tue Dec 25, 2018 12:28 am
Forum: Advanced users
Topic: Historic Unix R7 using SIMH
Replies: 17
Views: 5769

Re: Historic Unix R7 using SIMH

... it to work. Your clarification comes at the perfect time as Oscar is now shipping the PiDP-11 front-panel which is powered by Raspberry Pi running SIMH. Thanks to the generosity of my wife I'll be building one after Christmas.
by W. H. Heydt
Mon Dec 24, 2018 5:53 am
Forum: Advanced users
Topic: Historic Unix R7 using SIMH
Replies: 17
Views: 5769

Re: Historic Unix R7 using SIMH

I was primarily interested in the R7 and R8 releases of the research versions of Unix, as these are the systems discussed in "The Unix Programming Environment" by Kernighan and Pike. I remember using RT11 on a PDP-11 but my first experience with Unix was AIX on an IBM RT. Still hoping that the IBM ...
by pbnelson
Mon Dec 24, 2018 1:20 am
Forum: Advanced users
Topic: Historic Unix R7 using SIMH
Replies: 17
Views: 5769

Re: Historic Unix R7 using SIMH

Many thanks to ejolson for writing this up. I am posting a few minor but crucial edits. Like MaxK1 , I too am trying this on a cold Minnesota day, and I couldn't get the `dz` device working; the `ls -l unix` command returned only 52580 bytes, not 54866. Also, I got an error ` dz: cannot find ` when ...
by ejolson
Mon Dec 17, 2018 9:04 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 2312
Views: 111887

Re: Why Avoid BASIC on RPi?

... and PDP-11, but after that it was all high-level languages. In a way this post has triggered feelings of nostalgia that make me want to fire up SIMH and revisit my childhood. At the same time, it's good to see new opportunities for understanding with Raspberry Pi. Back on topic, I've been optimising ...
by DavidS
Mon Dec 10, 2018 11:00 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 2312
Views: 111887

Re: Why Avoid BASIC on RPi?

... power than the rest of the house and capable of up to 10MIPS using only 16-bit integer operations? RT-11 runs quite well on the Raspberry Pi under SIMH. Current state-of-the-art version control systems such as GIT, Bitkeeper, subversion and so forth do not track full metadata. This blog discusses ...

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