4 ms·

Just get it to run cobol and you’re golden.

• vincent-manis 6y ago
  Autocoder (macro assembler) was the main 1401 language.
• kens 6y ago
  Here's a video of Fortran running on the IBM 1401 at the Computer History Museum: https://www.youtube.com/watch?v=uFQ3sajIdaM https://www.youtube.com/watch?v=uFQ3sajIdaM Because memory was so limited (8000 words), the Fortran compiler operates in 63 phases, where each phase consists of 150 to 300 instructions. In other words, the compiler's code was broken into chunks of 150-300 instructions, and that's all that could run in a phase. I'll also mention that memory was 8000 words and not 8192 words, because the IBM 1401 used decimal arithmetic.
  • mjcohen 6y ago
    I thought it had 53 phases.
    • kens 6y ago
      The paper lists all 63 phases: http://ibm-1401.info/1401-IBM-Systems-Journal-FORTRAN.html http://ibm-1401.info/1401-IBM-Systems-Journal-FORTRAN.html
      • cheerlessbog 6y ago
        30 years of programming and it never occurred to me that DIM derived from DIMENSION.