lgriffin@xxxxxxxx writes (way off topic in hyperspace):
<< All the drivers were installed in CP/M by the machines mfg.. It was
rumored that the CP/M copyright was still in the original version of DOS 1.1.
I seem to remember seeing it been maybe it was just the Assembler copy right
left behind.
>>
Tim Patterson the original author is rumoured to have called it QDos. For
Quick and dirty dos. Dos 1.1 (ver?) introduced installable device drivers a
true inovation over CPM or even Unix. Both of which required a recompile and
relink with the kernel, if you changed say your hard drive or mouse. The
ease of just adding a device driver name in your startup file was truly a big
improvement. This eliminated the issue you mention of manufacturers having to
install all drivers first. The CPM API was mainly done through software
interupts with register variables setup to do whatever function you wanted.
Paterson duplicated the API functions added some of his own and mimicked the
described behaviour. He wanted programmers to be able to port their software
very easily from CPM.
Regards,
Tim Hughes
>>Hi100@xxxxxxx<<
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