Digital Equipment VAXstation 3100 Maintenance Manual page 230

(
D
VMB Boot Error Status Codes
Figure D-1 shows the two types of VMB error displays. PC indicates the
conlents of the program counter at the time of the error, RO indicates the
contents of register 0 (VMB boot error status codes listed in Table D-1) at
the time of the error, and PSL indicates the contents of the program status
longword.
Each error code's lower three bits (hexadecimal) represent a severity level
and may be changed by the software. For example, 000001F4 is a parity
error and represents an error status, but OOOOOlFO through 000001F7 also
represent parity errors of varying severity. Therefore, the error code numbers
listed in Table D-1 represent the typical value of each error code.
1) Generic error message where RO is a status code.
%VMB-F-ERR, PC
c
nnnnnnnn
%VMB-I-STS, RO
=
nnnnnnnn
2) Unexpected exception. These represent internal VMB errors,
%VMB-F-SCBINT, PC • nnnnnnnn, PSL
=
nnnnnnnn
OR
%VMB-F-SCBINT2, PC
=
nnnnnnnn, PSL
=
nnnnnnnn
Figure D-1 VMB Error Displays
209