Fortran example problem on IBM 1401 emulator – solved

I solved the problem, I described here. I was using the IBM 1401 simulator V3.8-1. All I did was switch to IBM 1401 simulator Open SIMH V4.1-0, and now the results match the video and the IBM 1401 Fortran manual. Here is the new output. I actually contacted Mike Albaugh, from that video. He’s working …

Simh & Unix 6

As a fan of DEC and Linux… I don’t know why it’s taken me so long to put Unix on the PDP-11. My thought process tells me Version 6 sounds like it might not be so old, however it was released in May 1975. Anywho… the end of the install https://decuser.github.io/unix/research-unix/v6/2022/10/19/installing-and-using-research-unix-v6-in-open-simh-pdp-11-emulator.html I don’t know why …

Ran Fortran example on IBM 1401 emulator

A computer announced by IBM in 1959. Older than the 360. It was actually a very successful computer for it’s time. Lot’s of interesting stuff here. Using simh, and this. It seemingly compiled/ran successfully, but results don’t match book. Perhaps a source problem. It’s late getting tired, more tomorrow. It’s cool that it ran, however …