User`s guide

Table 2-1 CPU Halt Codes and Halt Conditions
Code
Halt Conditions
00 Halt command - given by the operator while the processor is in the Console mode.
01 Self-test was successful.
02 CPU Halt - operator typed CTRLjP while the machine was in the Program mode.
03 Typed by the console on a power fail restart. Does not appear in the halt message.
04 Invalid interrupt stack (IS) or unable to read system control block (SCB).
05
CPU double error. A second machine check occurred before a previous one could be
reported.
06 CPU Halt - CPU executed a halt instruction in the kernel mode.
07 Invalid system control block (SCB) vector (bits <01:00> of the SCB vector =3).
08 No user WCS - SCB vector bits <01:00> = 2 with no user WCS installed.
09 Error Pending on HALT - processor was halted by a CTRLjP before an error halt could be
performed.
OA Change Mode from internal stack instruction was executed when the PSL <IS> bit was set.
OB Change Mode to interrupt stack instruction was executed when the exception vector for a
change mode had bit
<0> set.
OC SCB Read Error - un correctable memory error occurred when CPU tried to read an
exception
of interrupt vector.
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