🚀 go-pugleaf

In article <1991Jun25.161701.19221@bilver.uucp> bill@bilver.uucp (Bill Vermillion) writes:
>In article <1991Jun24.074048.8539@ITcorp.com> geoff@ITcorp.com (Geoff Kuenning) writes:
>>In article <1991Jun22.223038.4257@weyrich.UUCP> orville@weyrich.UUCP
>>(Orville R. Weyrich) writes:
>>
>>> I would love to see MS try that -- MS-DOS itself started out as a clone of
>>> DR's popular [at the time] CP/M operating system. But of course, DR can't
>>> complain too loudly itself, as CP/M is very reminiscent of DEC's RSX
>>> (and perhaps other earlier DEC operating systems).
>>
>>This claim is rather weak, to say the least.  Even a cursory
>>comparison of DOS V1 with CP/M would show that it's not a clone.  A
>>bit of investigation into the history would support this conclusion.
>
>But you did not mention the history.   DOS is a decendanct of CPM.
>
>When Seattle Computer Products introduced their 8086 based S-100 system
>board they supported it with a derivative of CPM.  
>
>Later when IBM approached Microsoft they took the Seattle Computer Products
>OS (sometimes called QDOS - Quick 'n' Dirty Operating System) and re-worked
>and renamed it PC-DOS.
>
>A decendant of CPM would be appropriate - that is why it appeared to be
>"clone-like".

Was SCP's product a 'derivative work' of CP/M (in the legal sense that the
CP/M source code was modified to obtain it), or was it a clone of CP/M
(i.e. re-developed from specifications without reusing the source code)?

My impression was that it was the latter. No?

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Orville R. Weyrich, Jr., Ph.D.                   Certified Systems Professional
Internet: orville%weyrich@uunet.uu.net             Weyrich Computer Consulting
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