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From: "Nick Roberts" <nickroberts@adaos.worldonline.co.uk>
Newsgroups: comp.lang.ada
Subject: Re: AdaOS
Date: Fri, 9 Nov 2001 23:30:20 -0000
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Date: 2001-11-09T23:30:20+00:00
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I suppose from Microsoft's point of view its a useful marketroidal term:
either they or third parties supply the device drivers, but the
PC/motherboard manufacturer supplies the HAL. Ever since the invention of
the IBM PC there has been the curious and unique (in its extent) phenomenon
of hardware being arduously designed to fit pre-existing software.

>From my point of view, there's no technical difference between different
levels of DD. In AdaOS, there will be some DDs three or four levels above
the hardware. E.g. the Virtual Graphics Console DD will communicate with a
mouse DD, but that might communicate with the actual mouse through the
serial port DD and serial port. To say any one of these levels is a
'hardware abstraction layer' would, of course be completely arbitrary, so I
hope it's not a term taught to students.

--
Best wishes,
Nick Roberts



"Ted Dennison" <dennison@telepath.com> wrote in message
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