Profile

Cover photo
Peter Bortas
115 followers|145,037 views
AboutPostsPhotos

Stream

Peter Bortas

Shared publicly  - 
 
Now dumping the first PROM from LYS16. Marked "L Sin.20" I expect this one to contain one half of a sinus table, so it gets to be the guinea pig for testing. My EEPROM-programmer does support this chip (Intel 2716), but some addresses did not get consistently dumped.

So I borrowed an Arduino from +Peter Kjellström, wired it up and wrote my own dumper. It gives the chip ~400 times longer margin to stabilize the data pins than the data sheet says should be needed. That seems to have helped which is a relief, the prospect of rotting PROMs is scary. To be on the safe side the program verifies the dump 10 times.

The end result is that it takes 8s per byte to dump, but even at that speed I could complete the dumps over the weekend.
7
1
Henrik Grubbström's profile photo
Add a comment...

Peter Bortas

Shared publicly  - 
 
Spending some of my vacation documenting the guts of LYS-16. They are by now pretty rare. I only know of four in existence, two of which are in museums. Unknown if any of them are still working, and I'm not testing the two I have until I've made sure the ROMs are dumped.
9
1
Hans Franke's profile photoAnders Piniesjö's profile photoPeter Bortas's profile photoHenrik Grubbström's profile photo
5 comments
 
There will be one if I manage to dump some code.
Add a comment...

Peter Bortas

Shared publicly  - 
 
Second print with my K8400. Turned out better than expected, and I hear the internet likes cats.
2
Johan Pfeifer's profile photoPeter Bortas's profile photo
4 comments
 
Indeed, thus cats instead. :)
Add a comment...

Peter Bortas

Shared publicly  - 
 
New cluster "Bifrost" being installed at NSC.
9
Add a comment...

Peter Bortas

Shared publicly  - 
 
Downsides of a hot summer: I need more power to be able to expel power from my apartment. The extra AC I set up managed to trigger the mains fuse and I was just woken up to beeping and this:

2014-07-25 23:52:43 +0200 Power failure.

2014-07-25 23:52:49 +0200 Running on UPS batteries.

2014-07-25 23:53:31 +0200 Mains returned. No longer on UPS batteries.

2014-07-25 23:53:31 +0200 Power is back. UPS running on mains.
2
Henrik Grubbström's profile photoJohan Sundström's profile photoAndreas Lindqvist's profile photoPeter Bortas's profile photo
8 comments
 
One of those cheap portable ones on wheels. Often called 'pingvin'. Bought on CO many yeats ago.
Add a comment...

Peter Bortas

Shared publicly  - 
 
 
New stable Pike build 7.8.866 available

Hello all,

I'm pleased to announce a new release in the Pike 7.8 stable series is 
available for download from the pike website:

http://pike.lysator.liu.se/download/

Please feel free to download, build and try it out. For details of what's 
new and different, please refer to the Pike 7.8 changes file:

https://github.com/pikelang/Pike/blob/7.8/CHANGES

Windows binaries and updated package definitions should be coming in the near future; further announcements will be made once they're ready to go.

As always, please feel free to drop me a note with any questions, comments or concerns.
4
Add a comment...

Peter Bortas

Shared publicly  - 
 
 
OpenSSL continues with its tradition of vulnerabilities:

https://www.openssl.org/news/secadv_20140605.txt
OpenSSL Security Advisory [05 Jun 2014] ======================================== SSL/TLS MITM vulnerability (CVE-2014-0224) =========================================== An attacker using a carefully crafted handshake can force the use of weak keying material in OpenSSL SSL/TLS clients and servers ...
3
Gustaf Hansen's profile photo
 
Det vore en skam om de la ner en så gammal och fin tradition. Dagarna skulle bli så trista om man visste att ens servrar är säkra.
 ·  Translate
Add a comment...
Have him in circles
115 people
Johan Schön's profile photo
Tobias Josefowitz's profile photo
M Norrby's profile photo
Jenny Häll's profile photo
Tempo Automation's profile photo
Linus Tolke's profile photo
Mika Perälä's profile photo
Abnus AB .ITKIT's profile photo
Peter Eriksson's profile photo

Peter Bortas

Shared publicly  - 
 
First package from China with PROM stuff came in. This covers most of the modern chips. Still waiting for some loose parts so I can build adapters for really old chips.
2
Add a comment...

Peter Bortas

Shared publicly  - 
 
Got my dose of real Midsummer celebrations today. I should be OK for another four years now.
3
Add a comment...

Peter Bortas

Shared publicly  - 
 
Restaurerar kulturskatt.
 ·  Translate
8
Anders Norman's profile photo
 
snyggt jobbat!
 ·  Translate
Add a comment...

Peter Bortas

Shared publicly  - 
 
Mike is my favorite reverse engineer, I want to build one of these so bad.
2
Add a comment...

Peter Bortas

Shared publicly  - 
 
Bryan Cantrill (of dtrace fame) demonstrates the effect of shouting at your spinning metal plates.
3
3
Peter Bortas's profile photoLeif Nixon's profile photoTed Wallin's profile photoJoel Hansell's profile photo
2 comments
 
I'm in the deployment phase, but I might find time for this.
Add a comment...
People
Have him in circles
115 people
Johan Schön's profile photo
Tobias Josefowitz's profile photo
M Norrby's profile photo
Jenny Häll's profile photo
Tempo Automation's profile photo
Linus Tolke's profile photo
Mika Perälä's profile photo
Abnus AB .ITKIT's profile photo
Peter Eriksson's profile photo
Collections Peter is following
Basic Information
Gender
Male
Links
Contributor to