Profile

Cover photo
Peter Bortas
119 followers|158,391 views
AboutPostsPhotos

Stream

Peter Bortas

Shared publicly  - 
 
This years Christmas present to myself: Fancy soldering station WX2021. Things get so much easier with good tools.
6
Marcus Agehall's profile photoPeter Bortas's profile photo
2 comments
 
Yea, having a "large" tip with a lot of mass is nice for desoldering and through hole stuff.
Add a comment...

Peter Bortas

Shared publicly  - 
 
XKCD describes my normal git workflow.
3
Add a comment...

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.
9
1
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.
10
1
Hans Franke's profile photoAnders Piniesjö's profile photoPeter Bortas'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...
In his circles
141 people
Have him in circles
119 people
Anders Johansson's profile photo
Tomas Hässler's profile photo
Johan Eriksson's profile photo
Marcus Agehall's profile photo
David Byers's profile photo
Prashanth Chengi's profile photo
Jens Larsson's profile photo
Joel Hedlund's profile photo
Hans Persson's profile photo

Peter Bortas

Shared publicly  - 
 
My 2.7TiB box.

2736GiB of RAM rescued from being thrown away. It doesn't look like much in a moving box, but it will keep Lysator and Ctrl-C happy on the memory front for a couple of years I'd hope.
10
Niclas Andersson's profile photo
 
Share and enjoy! I hate scrapping systems that still have some value left even if the power bill put an end to the litetime.

Old systems is like old people: lack of memory is the first sign. ;-)  However, in this case it might be reused.

Several years ago, during the installation of Neolith, we got a good sized pallet delivered of  about 12 TiB new memory in 1GB and 2GB dimms that was to be replaced. I did notify the security guard about the precious pallet: guard it as it was made of gold!

Cheers,
Niclas
Add a comment...

Peter Bortas

Shared publicly  - 
 
The twisted remains of a slaughtered super computer.
4
Jonas Petersson's profile photoPeter Bortas's profile photoNiclas Andersson's profile photo
3 comments
 
Now we have evidence! You've killed the Flying Spaghetti Monster.
Add a comment...

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.
3
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...
People
In his circles
141 people
Have him in circles
119 people
Anders Johansson's profile photo
Tomas Hässler's profile photo
Johan Eriksson's profile photo
Marcus Agehall's profile photo
David Byers's profile photo
Prashanth Chengi's profile photo
Jens Larsson's profile photo
Joel Hedlund's profile photo
Hans Persson's profile photo
Basic Information
Gender
Male
Links