PIDP11 (and maybe PIDP8) notes

how to get back your session with PIDP11 installed

any time a session is connected it is connected to a screen session running the switch gizmo on PIDP11

normal screen console input seems to work, so <ctl><a> <ctl><d> gets you detached from the session.

structure

the engine for this is a simh generated to accept input from the console monitor (above) which reads the gpio and sends command to the simh emulator.

A controlling client for simh is running separately, and may be connected to.  There seems to be a session running as a demon as well

on the version I'm running:

#cd /opt/pidp11/src/02.3_simh/4.x+realcons/bin-rpi

#./pdp11_realcons

this will get a simh> prompt.  Not sure what's included here.

selecting boot and OS images

There is a prompt on the Screen session indicating how to select a boot OS configuration.  I'm currently without hardware, and there seems to be no response to console, so cannot select and run the emulation as of yet.


Using the Screen command
https://linuxize.com/post/how-to-use-linux-screen/

--30--

Data General 1 Pharaoh system

Here are some photos of the system.

Including one with the ext keyboard jack.

External Keyboard Jack

--30--

Yet another Mozilla / Firefox Cluster Fsck, screwed over the certificats and invalided about 90 percent of the plugins

This is getting really old.  First Mozilla invalidated a huge number of utilities, which most developers have no way of fitting to the new and improved API, or require a massive rewrite, without anything but arrogant disregard for the needs of users or developers.

Now they've screwed the pooch with a FSCK letting a certificate which signs a lot of new and old plugins be installed to expire.

In an unmodified, unupdated Firefox 54, 75% of my plugins are now disabled.  Thanks butholes

Here's the adblock plus blog, and also a copy of a fix, which I'm saving here in case it at leasts adblock plus install.  Needed to remove all the skred from pages.

I won't upgrade a couple of systems to the latest and track it as I need a couple of the plugins from time to time, and I use them on the same sites as always.  Some exposure of risk, but not a lot.


https://adblockplus.org/blog/firefox-bug-disabled-all-add-ons-including-adblock-plus#comment


Comment 37 in the blog (referred to in 111 below)

John  2019-05-05 00:47  #

The only way to fix it (as suggested elsewhere) is to manually install the fix:
right click this link and save it as *.xpi and than run it with FF
https://storage.googleapis.com/moz-fx-normandy-prod-addons/extensions/hotfix-update-xpi-intermediate%40mozilla.com-1.0.2-signed.xpi
and the same with Adblock Plus (if someone has uninstalled this like me)
right click this link and save it as *.xpi and than run it with FF
https://eyeo.to/adblockplus/firefox_install/firefox

Reply from Laura Dornheim:

Hi John,

thanks for sharing this!
This indeed is a working solution but I recommend only users that understand what they are doing to apply this. ;-)
Best,
Laura

Comment 111 in above blog

NeverchangewhatisOK

2019-05-06 10:26#

YOU DO NOT HAVE TO UPDATE FIREFOX FOR THE ADD-ONS TO WORK AGAIN.
THE TIP IN POST 37, REPEATED IN POST 90, WORKS!
You do not even need to install the fix manually from the downloaded xpi file.
Simply put the address of the fix below in the Firefox address bar.
https://storage.googleapis.com/moz-fx-normandy-prod-addons/extensions/hotfix-update-xpi-intermediate%40mozilla.com-1.0.2-signed.xpi
After installing the fix, go to the menu, tools, add-ons and from either the extensions tab or unsupported tab update Adblockplus.
For those who have an up to date Adblockplus and may therefore not be able to update it, downloading it again from https://adblockplus.org should work as well.

My comment about the problem, and reply from Laura

jim st 2019-05-05 07:40 #

I was running fine on version 54 of Firefox, and they broke it with whatever they did. If I upgrade, I lose a lot of plugins I use, so maintain a system with 54 on it specifically for that purpose.

How the hell did they break an old revision? Can I get a copy of adblock plus, or will you run back thru all the down revs you might have (seem to remember doing that, maybe not with ABP though) so I can get it running?

I’m about done with firefox, between the destruction of the addon community with their ill guided upgrade and no back compatability to the developers, and now this, I think of the story about the mule and the two by four.

“That’s Two”

thanks for this wherever it appears.

Reply from Laura Dornheim:

Hi Jim,

I feel your frustration!
This is super annoying.

You can actually find older versions of Adblock Plus in the Mozilla add-on store.

Hope this helps!

link in above (italics)
https://addons.mozilla.org/en-US/firefox/addon/adblock-plus/versions/

**************
comment 125



125  Fireflux  2019-05-07 01:31  #

Thank you for posting that Reddit link, RR! Updating the certificate with the one taken from Mozilla’s own XPI fix worked for me, or at least until it expires again in 2025, lol!

Here is the link once again, just in case someone needs it:

https://www.reddit.com/r/firefox/comments/bkspmk/addons_fix_for_5602_older/

My Firefox version is 51.0.1 in case anyone is wondering. Thanks so much once again! So glad to have Adblock working again!



--30--

ipfire upgrade notes 111 to 121 then to current

ipfire 2.19 111 backup to create ISO is broken.

One needs to patch /usr/local/bin/backupiso to point at a new subdomain.  They changed the subdomain for the downloads from download.ipfire.com to downloads.ipfire.com, and didn't leave the old subdomain for older backups.

the ipf file is created w/o problem, but it's always good to have a testable iso to use before embarking on any big upgrade.

topic on the forum:

Resolving download.ipfire.org fails - 'unknown host'

https://forum.ipfire.org/viewtopic.php?f=27&t=19579&p=111171&hilit=backupiso#p111171



--30--

Zos mainframe notes

searches to find IBM tcp zos stuff thru search engines
change tcpip routing zos tso

Hercules TCP/IP

http://www.hercules-390.org/herctcp.html

TCPIP ipv4 forwarding

Current IP forwarding status

Read a current state of IP forwarding:

# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1

Currently, the output number 1 indicates that the IP forwarding is enabled. The above value is read from the Linux proc file system and more precisely from the actual file /proc/sys/net/ipv4/ip_forward file:

# cat /proc/sys/net/ipv4/ip_forward
1

Disable IP forwarding

To disable IP forwarding on a running Linux system run:

# sysctl -w net.ipv4.ip_forward=0
net.ipv4.ip_forward = 0 

https://hercules-390.github.io/html/herctcp.html

telnet works on TSO

Note that flashes up before entering session

 EZA8265I Using Line Mode...

 EZA8267I Notes on using Telnet when in Line Mode:
 EZA8268I - To hide Password, Hit PF3 or PF15
 EZA8269I - To enter Telnet Command, Hit PF4-12, or PF16-24
 ***