The leds and patch panel display show 7 through 1, with zero being control passing to secondary bootstrap. DAP leds Led display on, on, on 7 microverify failed before completing the data path microsequencer test on, on, of 6 error found on DAP module on, of, on 5 Error found on MCT module on, off, off 4 undetermined error in DAP/MCT interface off, on, on 3 microverify worked as expected if bootstrapping was attempted, bad memory was found off, on, off 2 no boot device was found off, off, on 1 unable to boot from selected device off, off, off xxx control passed to secondary bootst. This from the januaryu 1984 microvax I cpu technical description. Joe Heck