UBA_NEED16 & 4.2BSD in uballoc()

[Chris Torek]

In my sys/vaxuba/uba.c I find the following:

	if ((flags & UBA_NEED16) && reg + npf > 128) {
		/*
		 * Could hang around and try again (if we can ever succeed).
		 * Won't help any current device...
		 */
		rmfree(uh->uh_map, (long)npf, (long)reg);
		splx(a);
		return (0);
	}

This is in ubasetup(), right after getting map registers; the next
couple of statements are

	bdp = 0;
	if (flags & UBA_NEEDBDP) {
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251)
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