IBM 3745 Series Service Functions page 24

Field E
Field F
MSA (CCU Information)
2. Power the CCU ON.
3. Wait for the end of IML.
SERVICE-MODE MOSS is in maintenance mode (service personnel only).
The following table gives the MOSS status after the different types of 1M Ls and
IPLs.
After MOSS Status
Control Panel Hex
Display
Initialization (general MOSS ONLINE
X'OOO'
IPL)
MOSS IML
MOSS ALONE
If
CP
IS
not loaded X'FOE'
MOSS OFFLINE
If
CP
IS
loaded X'FOF'
CCu/Scanner IPL MOSS ONLINE X'OOO'
Step by step IPL MOSS ONLINE X'OOO'
Bypass phase 1 I PL MOSS ONLINE X'OOO'
Note: For a machine with two CCUs, the code displayed on the control panel
reflects the last operation executed.
Displays 8T (highlighted) when the branch trace function is active.
Updated each time an output X'71' instruction is executed, by the control
program, for example, when using the CCU data exchange function or the
control program procedures, or during 3745 initialization.
Output X'71' contents are buffered. If the buffers are overrun because of inten-
sive output, some data may be lost; however, the last value in output will be
displayed.
X71
=
xxxxxx
Contents of CCU X'71' output register.
X71
= ERROR Error when accessing the reg ister. Register contents cannot be
displayed.
At initialization time, field 'F' displays:
X71=xxyyzz
where xx are the 3745 initialization flags with the following
meaning:
01
Load/dump request detected on a link-attached 3745.
02 Load/dump request detected on a channel-attached 3745.
05 Dump in progress on a link-attached 3745.
06 Dump in progress on a channel-attached 3745.
09 Control program load in progress on a link-attached 3745.
OA Control program load in progress on a channel-attached
3745.
11 Remote Power Off (RPO) command is detected.
20 Control program loader/dump abend before a load/dump
request detected on a channel- or link-attached 3745.
21 Control program loader/dump abend on a load/dump request
detected on a link-attached 3745.
Chapter 1. How to Use the MOSS Function Screens
1-11