PROBLEM:  (QAR 48650, QAR 54414)    (Patch ID: OSF405-303)
********
This patch fixes the following problems that occur on AlphaServer 1000A 4/233
and 4/266 systems.

o  If a machine check occurs on an AlphaServer 1000A 4/233 or 4/266, the
   register data written to the binary.errlog will show zeroes in all
   registers when viewed with DECevent.

o  If a correctable memory error occurs, the system panics with a kernel
   memory fault.  The kernel memory fault occurs in procedure bcopy(),
   called by harderr_intr() from source file kn22a.c.  A typical stack
   trace will look like the following.

 0 boot() 
["../../../../src/kernel/arch/alpha/machdep.c":2466]
 1 panic() 
["../../../../src/kernel/bsd/subr_prf.c":707]
 2 thread_block() 
["../../../../src/kernel/kern/sched_prim.c":1925]
 3 thread_preempt()
["../../../../src/kernel/kern/sched_prim.c":3820]
 4 boot()
["../../../../src/kernel/arch/alpha/machdep.c":2410]
 5 panic(s = 0xfffffc000068d170 = "Machine check - Hardware error")
["../../../../src/kernel/bsd/subr_prf.c":791]
 6 machcheck()
["../../../../src/kernel/arch/alpha/hal/kn22a.c":3030]
 7 mach_error()
["../../../../src/kernel/arch/alpha/hal/cpusw.c":808]
 8 _XentInt()
["../../../../src/kernel/arch/alpha/locore.s":1112]
 9 bcopy()
["../../../../src/kernel/arch/alpha/fastcopy.s":324]
 10 harderr_intr()
["../../../../src/kernel/arch/alpha/hal/kn22a.c":3378]
 11 softerr_intr()
["../../../../src/kernel/arch/alpha/hal/kn22a.c":4338]
 12 mach_error()
["../../../../src/kernel/arch/alpha/hal/cpusw.c":802]
 13 _XentInt()
["../../../../src/kernel/arch/alpha/locore.s":1112]