🚀 go-pugleaf

In article <9301147@comp.compilers> ferriere@gr.osf.org 
(Francois de Ferriere) writes:

   I'm looking for known hardware bugs.

Do microcode bugs count as well?
If so, then there was (and I expect there still is) a nice one in the
implementation of the REI instruction on the VAX11/780. Briefly, when
returning from an AST, which is (among other things) done by REI, it is
confused when just at that time another AST is queued, and restores wrong
stack pointers into some registers (disclaimer  all from ageold memory...).
This bug lay hidden for at least five years, until a lot of people suddenly
had unexplained and irreproducible crashed in standalone BACKUP, which works
almost entirely with ASTs and exercises the system...The fix was to add a
sanity check to the AST delivery code that would readjust one of pointers
if it contains an "impossible" value to something valid. Maybe somebody
with access to the VMS source CD could check whether that fix is still in?
How about OpenVMS on AXP :)??

	Jan