Move all splxxx() and softint-related macros and prototypes to intr.h,
and include it where appropriate.

Define spladb() (conservatively, at least for now).

Move splimp back to spl2 (from spl4).

raise splimp() to spl4(); we need to block zs interrupts, too.

Ooops. cut 'n' pasto. splzs should 4, not 2.

Serial driver with interface to a slightly modified version of the machine-
independent z8530 driver. When that driver is updated, the local copy
of those files may be removed. From Bill Studenmund

Serial driver with interface to a slightly modified version of the machine-
independent z8530 driver. When that driver is updated, the local copy
of those files may be removed. From Bill Studenmund.
Compiler warnings fixed by me.

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Update several comments.

Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards a

Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped. I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.

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Move spl stuff from param.h to psl.h. Prototype delay() in param.h.

new RCS ID format.

Fixup to use m68k headers, now. Thanks, Chris.

Added signal.h for -current. The rest is formatting changes.

The current MacBSD architecture sub-directory for NetBSD-0.9--more or
less. It needs some help to get to be -current. Support for minimal
hardware on the SE/30, II, IIx, and IIcx exists.