Cite as: Real Problem AI problem “Why is a working business one dead ISA card away from shutting down?”. Opportunity score 8.0 out of 10 (severity 8, AI feasibility 7, market signal 9, competition gap 8). Category Others. Trend LLM. Source signal: Ask HN thread asking who still keeps a DOS machine running because the business depends on it, 25 September 2026, 277 points and 293 comments.. Canonical URL: https://www.realproblem.ai/archive/why-is-a-working-business-one-dead-isa-card-away-from-shutting-down.
Why is a working business one dead ISA card away from shutting down?
Labs, workshops and small firms still run core processes on DOS machines with custom ISA cards, parallel-port dongles and dBase or Clipper apps, the one person who understood them has left, and a hardware failure would stop the business.
Who has it: Owners and lone IT staff at labs, manufacturers and small firms running critical DOS-era software and instruments.
- Severity8/10
- Feasible today7/10
- Market signal9/10
- Competition gap8/10
Heard in public
“I know of a DOS machine at a wool testing place that uses an ISA card based imager for measuring the micron and other things.”
Quoted word for word from the public post linked below. Nobody submitted it to Real Problem AI.
Ask HN thread asking who still keeps a DOS machine running because the business depends on it, 25 September 2026, 277 points and 293 comments.What nothing does yet
A migration service that reads the old dBase or Clipper source and data files, explains what the app actually does, generates a tested modern equivalent, and documents the instrument card protocol so the hardware can be bridged or replaced.
Tools that solve this
4 named so far, and where each one stops.
- 86Box and PCem
Cycle-accurate PC emulators, with no support for bespoke ISA instrument cards.
- DOSBox
Runs DOS software but not the hardware it controls.
- Harbour
Open-source Clipper-compatible compiler that still needs someone to port and test the app.
- Stockpiling period PCs
The real strategy the thread describes, until the spares run out.
Why it is archived
Retired in the 2026-10-25 freshness audit: same Hacker News thread as the newer, search-phrased problem about keeping a business running on an old DOS or XP machine.
How you might build it
- 01LLM code comprehension of legacy xBase source
- 02Automated test generation from recorded runs
- 03Data file conversion from DBF
- 04Hardware protocol capture and documentation
#N29F · Canonical URL: https://www.realproblem.ai/archive/why-is-a-working-business-one-dead-isa-card-away-from-shutting-down