On 6/6/23 10:22, Tom Gardner via cctalk wrote: > Thanks but I'm pretty sure the Hyperion was not PC-DOS compatible.
We have to be careful when tossing around the term "PC-DOS compatible". In particular, I'm reminded of a dodge used by Bill Godbout and his Compupro S-100 8086 and 8088 products. Early on, users wanted to be able to run MS-DOS programs. Microsoft, however, wanted an arm and a leg for the MS-DOS 1.x OEM kit--IIRC, around $50K. At the time, one could buy the pink-binder PC-DOS for about $40. So Compupro users wanting to run MS/PC-DOS were instructed to purchase the IBM-branded PC-DOS and Compupro supplied a substitute IBMBIO.COM file with instructions on how to create the hybrid. I don't know if this ever made it to 2.0, but it worked back then. Bottom-line, I'd rephrase that as "IBM 5150-compatible". --Chuck
