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ND-10191 — Fortran 77 for ND-100/NORD-10

Status: IN-PROGRESS

Field Value
ND article number ND-10191
Product name FORTRAN for ND-100/NORD-10 (ANSI-77)
Functional category Programming Languages & Compilers
ND doc-category tag 60 General [curated]
CPU target ND-100 / NORD-10
OS requirement unknown — no PD sheet located
Related products ND-10023/ND-10033 earlier FORTRAN compilers (this product is upward-compatible with their extensions to ANSI-77, per the PI sheet) · ND-210191 — later 21-prefixed article for the same product, see ../ND-210191/README.md · ND-10190/ND-210190 sibling compiler for ND-500

Description

ND FORTRAN based on the ANSI-77 standard (ANSI X3.9-1978), full implementation plus extensions. Full feature list: ../../Product-Info/ND-10191-A1-EN.md. [PI]

No Program Description or Product Information install sheet has been located for this product — only the general marketing PI sheet, and the floppies themselves. [OBS]

The 3-part floppy set, and why versions mix letters

This product ships as three separate floppies: PART1 (the compiler itself — does not depend on target floating-point format), PART2 (48-bit floating-point runtime banks), PART3 (32-bit floating-point runtime banks). Two labeled generations were found in the floppy library:

  • A complete, matched set at revision A: ND-10191A-PART1, ND-10191A-PART2, ND-10191A-PART3 (dated June 1982).
  • A partial, later revision at letter D: ND-10191D-PART2, ND-10191D-PART3 only (dated March 1984) — no ND-10191D-PART1 has been found, in this repo's temporary floppy reference or otherwise.

The D-revision files were also renamed — FORTRAN-1BANK-A/F32FORT-1BANK-A (A) became FORT48-1BANK-D00/FORT32-1BANK-D00 (D) — a naming-convention change, not just a version-letter bump, which is consistent with PART2/PART3 having been reworked independently of PART1.

Resolved, 2026-08: a real, complete, matched 3-part set was found at intermediate revision E00 — see ND-10191E00. Its FORTRAN-100-E00:PROG compiler binary is a real, distinct file, proving the compiler was revised past A. The D-revision's missing PART1 is therefore almost certainly just an unfound floppy, not evidence of a frozen compiler. E00's runtime naming (FORT48-1BANK-E0/FORT32-1BANK-E0) already matches D's post-rename convention.

Versions

Version Subfolder Status Notes
A ND-10191A IN-PROGRESS — no PD sheet, procedure inferred full matched 3-part set: ND-10191A-PART1/2/3
E (rev 00) ND-10191E00 IN-PROGRESS — full matched 3-part set, real floppies decoded 10191E00-1S/2S/3S + a bundled -1D; resolves the A/D PART1 question, see above
D ND-10191D IN-PROGRESS — PART1 missing/unconfirmed, see above ND-10191D-PART2/3 only

Documentation

Provenance

Floppy contents confirmed by downloading all five images from the ND floppy library and reading them with ndtool: ND-10191A-PART1 (MD5 ddbe57cf408b3a1dd8a5fbdebd6394fc), -PART2 (f01896b2106b273a53afd9e1b03cccda), -PART3 (372b44af118bd032ca7b7aae4723ce50); ND-10191D-PART2 (8abbcc51ffbe7f45e6a8c297cf3c2e99), -PART3 (84c15a0ddef7a096dae59332bf0e6757).

Parent: ../README.md (Software catalog)