[cctalk] Re: First non-IBM PC-DOS Compatible PC

May I suggest compatibility is like pregnancy – you either are or you are not. Hyperion never purported to be PC-DOS compatible and as noted it wasn’t even offered as generic MS-DOS compatible. Just because it runs PC-DOS 3.3 and some applications doesn’t establish that it was PC-DOS compatible – meaning 100% compatible 😊 Tom From: Santo Nucifora &lt;santo.nucifora(a)gmail.comSent: Tuesday, June 06, 2023 10:54 AM To: t.gardner(a)computer.org; General Discussion: On-Topic and Off-Topic Posts &lt;cctalk(a)classiccmp.org&gt; Subject: Re: [cctalk] Re: First non-IBM PC-DOS Compatible PC On Tue, Jun 6, 2023 at 1:23 PM Tom Gardner via cctalk &lt;cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org> > wrote: Thanks but I'm pretty sure the Hyperion was not PC-DOS compatible. I don't want to get off-topic here but the Dynalogic Hyperion is MS-DOS compatible. I do have one or two of them. I have run up to MS-DOS 5.0 on it as well as the Hyperion branded MS-DOS 2.11. There are some extra configuration commands in that particular version. I have only tried PC-DOS 3.3 on this but not other versions and it works okay. There are varying degrees of MS-DOS compatibility. It is NOT one of the few early computers that ran a customized version of MS-DOS 1.25 and could only run that. Those had horrible compatibility. Without those specific boot disks, the computer will not run. I have an STM Personal computer that is like this and I don't have the correct MS-DOS 1.25 for it to boot. It's a paperweight without it, unfortunately. Saying that, the Hyperion is not 100% MS-DOS compatible but it is relatively high. Dynalogic used to have compatibility lists of out-of-the-box MS-DOS software that would run without issues. You can see an example here: https://vintagecomputer.ca/files/Dynalogic%20Hyperion/compatibility/Hyperio… Now, if you stated, "100% PC-DOS compatible", then you would be accurate. Santo FWIW I remember as a PC clone user in the 1980s and into the 1990s acquiring machines that only ran PC-DOS and only using PC-DOS up to and including at least version 5. Tom -----Original Message----- From: db &lt;db(a)db.net <mailto:db@db.net> Sent: Tuesday, June 06, 2023 5:58 AM To: t.gardner(a)computer.org <mailto:t.gardner@computer.org> ; General Discussion: On-Topic and Off-Topic Posts &lt;cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org> > Cc: Tom Gardner &lt;tom94022(a)comcast.net <mailto:tom94022@comcast.net> > Subject: Re: [cctalk] First non-IBM PC-DOS Compatible PC On Mon, Jun 05, 2023 at 10:28:26PM -0700, Tom Gardner via cctalk wrote: FWIW I worked at a company here in Ottawa. Dynalogic. We produced a IBM look alike which had a BIOS not copied from the original IBM PC. In fact we used different UARTs and graphics card. Although I was not on the Bios team Don Bailey was. <http://www.sce.carleton.ca/faculty/bailey/bailey_bio.shtml> http://www.sce.carleton.ca/faculty/bailey/bailey_bio.shtml <https://museum.eecs.yorku.ca/collections/show/7> https://museum.eecs.yorku.ca/collections/show/7 -- <mailto:db@FreeBSD.org <mailto:db@FreeBSD.org> > db(a)FreeBSD.org <mailto:db@FreeBSD.org> <mailto:db@db.net <mailto:db@db.net> > db(a)db.net <mailto:db@db.net> <http://www.db.net/~db> http://www.db.net/~db https:/@Octodon.social/@Dianora