IBM 3745 Series Service Functions page 25

MSA (CCU Information)
Field G (and Field M)
22 Control program loader/dump abend on a load/dump request
detected on a channel-attached 3745.
25 Control program loader/dump abend on a link-attached 3745
dump.
26 Control program loader/dump abend on a channel-attached
3745 dump.
29 Control program loader/dump abend on a link-attached 3745
control program.
2A Control program loader/control program abend on a channel-
attached 3745 control program.
40 Load dump request from disk.
44 Dump to disk in progress.
48 Control program load from disk in progress.
60 Control program loader/dump request from disk abend.
64 Control program loader/dump from disk abend.
68 Control program loader/control program from disk abend.
where yyzz shows the IPL port address. This encoded address is
displayed in decoded form in field V, preceded by CA or L (see
field V in "MSA Field Definitions (IPL Information)" on page 1-17).
except when xx = 00, in which case:
• yy shows the link ports defined in the Link IPL port table.
• zz shows the link IPL ports that are presently enabled.
Field 'G' is displayed, along with field 'M', when the CCU status is STOP X'70',
STOP PGM, STOP BT, STOP AC, or HARDSTOP (see field H).
LAR=xxxxxx OP=xxxx C=x (field G)
IAR=xxxxxx ILVL=xxxx Z=x (field M)
lAR=xxxxxx
OP=xxxx
C=x
IAR=xxxxxx
ILVL=xxxx
Z=x
Address of the last executed instruction.
Last executed instruction.
Value of the C-Iatch (0 or 1).
Address of the next instruction to be executed.
Active CCU interrupt levels (1 to 4).
Value of the Z-Iatch (0 or 1).
CCU INTERRUPTS DISABLED
nothing displayed
(field G)
(field M)
No interrupts can be
received
from the CCU:
• During a MOSS IML from the control panel, just after power ON.
• While performing CCU IPL to
avoid
automatic CCU re-IPL in case of
HARDCHECK (see field G).
• While mounting a new diskette (service personnel only).
• After a fallback.
• While performing some utility programs
(service
personnel only) to
prevent
interference with the utility program. All communications between the CCU
and MOSS are delayed. For example, a BER generated by the control
program is kept until the utility program ends and MOSS is back online.
CCU REGISTERS
NOT ACCESSIBLE
(in field G)
(in field M)
Appropriate registers cannot be read, so it is impossible to display LAR, OP, C,
IAR, I LVL, and Z information.
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3745 Communication Controller