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Questions tagged [ibm370]

17 votes
3 answers
2k views

How did EBCDIC files on IBM mainframes identify newlines?

I recently uncovered some old VM/CMS files that I archived around 30 years ago and have been looking at them out of curiosity. Since these were from an IBM System/370XA and VM/CMS, they're in EBCDIC ...
bjb's user avatar
  • 19.1k
10 votes
1 answer
775 views

Implementation details about Lotus 1-2-3/M

Does anyone have implementation details of Lotus 1-2-3 for VM/SP5 and MVS/XA? Which programming language and compiler was used? A video of a 3270 session would be interesting. Is there any source of ...
Polluks's user avatar
  • 896
7 votes
2 answers
1k views

What was IBM VS/PC?

I found this 1976 Digital internal memorandum which is a competitive evaluation of IBM mainframes versus Digital's DECsystem-10 machines. Page 7 says the following: In 1976 IBM announced VS/PC which ...
Simon Kissane's user avatar
8 votes
2 answers
900 views

How does one customize the 3270 TSO terminal login (NETSOL) screen in VM/370?

When using a pre-built system image such as the "VM/370 sixpack" or "MVS Tur(n)key" under Hercules, when a user connects a 3270 terminal, a login screen comes up with a banned ...
rbanffy's user avatar
  • 869
4 votes
2 answers
404 views

How can the current date be accessed from DOS/VS assembler?

In assembler on an old /370-125 running DOS/VS I can access the TOD (Time of day) with GETIME, i.e. the time since midnight. But I want to be able to print the date.
monok's user avatar
  • 150
13 votes
5 answers
928 views

Does anyone have any information on GUTS (Gothenburg University Timesharing System)?

Gothenburg Universities Computer Centre (in Sweden) developed a timesharing system for IBM mainframes, known as GUTS (variously expanded either as ''Gothenburg University Timesharing System'', or as ''...
Simon Kissane's user avatar
9 votes
1 answer
1k views

Why did IBM skip "System/380" as a mainframe family name?

I've been reading Exhibit 14971 from US vs. IBM (Parts 1, 2, 3) which seems to give a very good overview of the history of the computer industry up to 1980, particularly the way IBM handled its ...
Wildcat Matt's user avatar