The IBM1130 was a small business and scientific computer that was introduced by IBM in 1965. A typical system had 8K words of 16 bit memory, a single 1MB disk drive, a card read-punch, a line printer, an operator keyboard, and a console Selectric printer. 

Many 1130 users have very fond memories of the system; it had a high performance to cost ratio and was often directly accessible by its users, making the 1130 a sort of prototype for a "personal computer". 

Set up in conjunction with (which has many manuals, a list of known 1130s, and an 1130 emulator that runs with DMS2, FORTRAN, RPG, APL, and LISP), this group provides a place to discuss all aspects of the system -- hardware, software, memories or stories. 

Beyond that, we can also use this group as a coordination point for hobbyist projects or other related activities. 

If you are wondering if any 1130s are alive today, there are a couple. First, see the page on There is one being restored in California by Carl Claunch. See for more information.


Showing 1-20 of 309 topics
punching from fortran in sim1130? Doug Wegscheid 4/23/18
Example of code modification on the 1130 Eddy Q 3/9/18
Atomic instruction for the 1130 Eddy Q 3/8/18
typewriter code to ascii conversion for Windows Eddy Q 3/8/18
Race condition testing for READY Eddy Q 3/8/18
Problem reaching Richard Stofer 3/6/18
Voltage ranges and logic levels 1130 Roland Langfeld 1/31/18
What is that in the background? Bob Flanders 1/25/18
Lots of CYTOS output Eddy Q 11/27/17
CYTOS for the 1130 Eddy Q 11/26/17
Any interest in a PDF Line Printer Filter? Steven Zoppi 10/30/17
Microfilms Mickey Cohen 9/17/17 T-shirts Paul Anagnostopoulos 9/17/17
1130 COBOL - disk image Walter Mosscrop 9/16/17
A 1130 first? Bob Flanders 9/10/17
Re: [IBM1130] Digest for - 5 updates in 2 topics Mickey Cohen 8/15/17
Re: [IBM1130] Digest for - 2 updates in 1 topic Mickey Cohen 8/15/17
IBM 1800 computer document collection from 1974 / 1976 Ron Pool 6/24/17
[IBM1130] A list processing subroutine package for the IBM 1800/1130 Paul Birkel 6/23/17
Warm-up phase internal harddisk Roland Langfeld 6/17/17
More topics »