Big TURBOchannel support catchup from NetBSD, part 1.
A few local changes and tweaks remain.

This bring DEC 3000 machines back in the game, but framebuffers are still
not supported at the moment.

T

Big TURBOchannel support catchup from NetBSD, part 1.
A few local changes and tweaks remain.

This bring DEC 3000 machines back in the game, but framebuffers are still
not supported at the moment.

Thanks to ericj@ and nate@ for supplying me a DEC 3000 for testing.

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$OpenBSD$

from netbsd:
machine-independent TurboChannel bus configuration. These files
deal with stuff like:
(1) configuring built-in devices,
(2) looking at TC slots configuring any devices f

from netbsd:
machine-independent TurboChannel bus configuration. These files
deal with stuff like:
(1) configuring built-in devices,
(2) looking at TC slots configuring any devices found.
The lists of slots, slot locations, etc. and built-in devices
are provided by machine-dependent code. Interrupt handling
is also provided by machine-dependent code, but the MD code provides
hooks so that standard names for 'establish' and 'disestablish'
can be used in drivers.

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