Owner`s manual

Halt selected. If you type CTRL/P when the upper key switch is in the

Secure position, the CTRL/P is passed on to the operating system, and the

operating mode does not change.

CTRL/P interrupts program mode on the boot processor. The secondary

processors continue operating in program mode until they must wait for

resources locked by the primary processor. Some I/O devices also require

the attention of the primary processor. If a system remains in console mode

for more than 30 seconds, various system timeouts could cause the system

to hang when an attempt is made to return to program mode.

If you want to halt a secondary processor, you can issue a STOP command

(see Section 5.21).

To resume program mode, use one of these commands:

CONTINUE Resumes the program that was interrupted by the

CTRL/P

START Restarts the primary processor at a speciﬁed address

The console mode prompt is >>>. After entering a command, you may

receive a system error message with number codes in the form:

?nnnn <message>

where nnnn is a number in hexadecimal format.

These codes indicate an

error or a halted processor. See Appendix H for a listing of error codes for

Model 400 and higher systems. Appendix I lists Model 300 error codes;

Appendix J lists status and error codes for Model 500 and 600 systems.

When a secondary processor issues an error message, the primary processor

is responsible for displaying the error on the console terminal. The primary

processor displays these messages with a preﬁx indicating the node of the

originating processor. For example, if a secondary processor at node 5

halted, the primary processor would display the error message:

Node 5: ?0006 Halt instruction executed in kernel mode.

Node 5: PC = E00D26B4

Node 5: PSL = 041F0600

Node 5: ISP = 000002F0

On Models 300 and 400 a system error message and number code will appear as:

?nn <message>

Console 5–7