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Low-Level Debug (LLD) Panel Functions
These functions are enabled when the system is stopped and Functions 25 and 26 are
selected. These functions are used for analyzing IPL errors. The following list describes
all of the low- level debug (LLD) panel functions.
Function 55 - Display Service Processor Log Buffer Type B
The display service processor log buffer type B contains data related to the system
terminating. The data may be displayed 8 digits at a time. Select and enter a
subfunction number to display each word of data from 00 to FF.
Function 56 - Display Service Processor Code Area Type B
The service processor code area type B contains the state of the system processor and
service processor at the time of failure. This area contains data such as the failing LID
(Load ID) which indicates what LID the service processor wanted from the load-source
IOP. The data may be displayed 8 digits at a time. Select and enter a subfunction
number to display each word of data from OO to FF.
Function 58 - Display IPL Parameter Area
The IPL parameters area contains the status of the type of IPL being performed. The
data may be displayed 8 digits at a time. Select and enter a subfunction number to
display each word of data from OO to FF.
Function 59
Sets the first character of the base address for function 62 display.
Function 60
Sets the second character of the base address for function 62 display.
Function 61
Sets the last character of the base address for function 62 display.
Note: The address in function 62 consists of four bytes. The address is of the following
The address in function 59, 60, or 61 is changed by the following procedure.
1. Press increment or decrement until the function number (59, 60, 61) is displayed
2. Press Enter on the control panel; ** appears next to the function number.
3. Press increment or decrement until the correct value appears.
4. Press Enter.
5. Press increment or decrement until ** appears next to the function number.
6. Press Enter.
606
Service Guide
form:
ADDRESS 00 XX YY ZZ
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