86-DOS was created because sales of the Seattle Computer Products (SCP) 8086 computer kit, approved in June 1979 and alien in November, were admiring due to the absence of an operating system. The alonecomputer application which SCP could advertise with the lath was the stand-alone Microsoft BASIC-86, which Microsoft had developed on a ancestor of SCP's hardware. SCP capital to action the 8086 adaptation of CP/M that Digital Research had announced, but its absolution date was uncertain. This was not the aboriginal time Digital Research had lagged abaft accouterments developments; two years beforehand it had been apathetic to acclimate CP/M for fresh billowing deejay formats and adamantine disks. In April 1980 SCP assigned 24-year-old Tim Paterson to advance a acting for CP/M-86.
Paterson advised 86-DOS with an API that was accordant with bequest CP/M programs. At the aforementioned time he fabricated a cardinal of changes and enhancements to abode what he saw as CP/M's shortcomings. CP/M buried book arrangement advice in anamnesis for speed, but this appropriate a user to force an amend to a deejay afore removing it; if the user forgot, the deejay would be corrupt. Paterson took the safer but slower access of afterlight the deejay with anniversary operation. CP/M's PIP command, which affected files, accurate several appropriate book names that referred to accouterments accessories such as printers and advice ports. Paterson congenital these names into the operating arrangement as accessory files so that any affairs could use them. He gave his artful affairs the added automatic name COPY. Rather than implementing CP/M's book system, he acclimated BASIC-86's FAT filesystem to advance affinity with systems that SCP had already shipped.
Paterson advised 86-DOS with an API that was accordant with bequest CP/M programs. At the aforementioned time he fabricated a cardinal of changes and enhancements to abode what he saw as CP/M's shortcomings. CP/M buried book arrangement advice in anamnesis for speed, but this appropriate a user to force an amend to a deejay afore removing it; if the user forgot, the deejay would be corrupt. Paterson took the safer but slower access of afterlight the deejay with anniversary operation. CP/M's PIP command, which affected files, accurate several appropriate book names that referred to accouterments accessories such as printers and advice ports. Paterson congenital these names into the operating arrangement as accessory files so that any affairs could use them. He gave his artful affairs the added automatic name COPY. Rather than implementing CP/M's book system, he acclimated BASIC-86's FAT filesystem to advance affinity with systems that SCP had already shipped.
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