Looking at wikipedia, I would speculate that a regular MS-DOS boot disk might at least get that machine running. Here is a bit of what Wikipedia says... "...It included a version of MS-DOS called H-DOS and bundled word processor, database, and modem software." Steve Sent from my Sprint Samsung Galaxy S7. -------- Original message --------From: Herb Johnson via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> Date: 11/12/16 11:32 AM (GMT-05:00) To: vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> Cc: Herb Johnson <hjohnson@retrotechnology.info> Subject: [vcf-midatlantic] MS-DOS for Hyperion? Some school-teacher, asked me about an MS-DOS "boot disk" and BASIC for a brand "Hyperion" computer they obtained, from around 1983. They believe the OS was called "H-DOS". Anyone have a source for more Hyperion information, and for the software for this computer? Is this computer particularly noteworthy among early MS-DOS machines? - Herb -- Herbert R. Johnson, New Jersey USA http://www.retrotechnology.com OR .net