Archive for the ‘3270’ Tag


Saturday, February 18th, 2012

So today let’s talk about Mainframe security. 

Those of you not in the know, so about 97% of YosPos, mainframes didn’t initially come with any security of any kind. So about mid 1970 RACF was released and the people rejoiced because now they could finally limit access to things like datasets, resources.. whatever. The problem, it was made by, for, and of, spergs. But because the system we emulate is such an old shit box it doesn’t come with racf but the much older SYS1.UADS. 

Let’s launch our TN3270 emulator and I’ll show you what I mean

then we just logon as yospos

and here we…

Uh oh… that’s not good… wait I hear the printer

Cos what?


I’ve been infected

Cos Log


**dot matrix printer noise**

Saturday, February 18th, 2012

So we tried klingon and had no idea what the hell was going on. But when you look at it on CBT tape it sounds like it’s the sequel to startrek. 

Now I’m pretty sure startrek is installed but lets see. First we need to connect with a TN3270, luckily I found a freeware one.

So we just browse on over to SYS1.CMDPROC

And there we go, STARINIT, STARTREK and STARRANK, let’s give this thing a try….

we exit back to the prompt and type ‘starinit’ to get everything setup

and we run startrek to give it a sh-


maybe I can fix this, taking a look at the launch script…

welp.. just so this isn’t a shit update (hint: they’re all shit) let’s upload and execute a job that will print on my printer. 

So, we make a job

and then, using the built in FTP server, we upload it and execute it using AAINTRDR

it executed the job and after giving the printer a bit of time….


So, being the classy guy I am on this historical operating system that deserves our respect and addoration, what else would I do…

How I really feel about mainframes

Check out the whole printed job log: YOSGOAT.PDF, you have know idea the level of satisfaction I get from feeding through that garbage through this ancient OS. 

Next Time:


Wednesday, February 15th, 2012

So I heard someone had made klingon playable on MVS 380 so I downloaded their files and powered on the mainframe and logged on

First launching my ever reliable TN3270 emulator

whoa wrong IPL, lemme IPL the right one

after a bit…

this looks awful, after some research I found out I can customize this screen, 10 mins and an ASCII generator and here we go

now thats a welcome screen.

Alright so we got the right one but it still shows the default logon screen, let’s change that to something better

ahh much better

so we log on with the default account herc01, how boring let’s make a yospos account

and change the password

so we log off and back on with yospos and browse on over to the dataset with klingon (just to confirm it’s there)

we then exit and at the TSO “prompt” we type KLIGNON, we get some nice graphics that I’m too slow to capture but you can see them in this tape file

So here we are

who needs instructions

a new game because I’ve never launched it before but I know I’ll be great at it

and we start the game

to be honest this is the best looking game I’ve seen on the mainframe, I’m actually surprised by this. I didn’t read the instructions so I don’t know what the fuck is happening but still, a decent game I guess. Better than Chess for sure.