Enhanced Processor Error Detection Using Address Parity
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Most processors having external control-store arrays for microcode are susceptible to undetected hardware errors on the array address lines. Without proper detection, a stuck fault or intermittent fault on the array address could result in the improper control word data being fetched. The address lines most susceptible to intermittent or stuck faults are ones that go to one or more off-chip arrays.