AM3270 Management Programming Manual
 EVENT MANAGEMENT
 4: ZAM3-EVT-CIU-ERR
 For the CIU, the bits of the status word that are equal to 1 can
 be interpreted as follows:
 Bit Meaning
 .
0
 Power on (unit 0)
 .
1
 Channel underrun (write unit)
 Channel overrun (read unit)
 .
2
 Channel abort
 .
3
 CIU detected channel parity error
 .
4:7
 Unused, should never be used
 .
8
 CIU internal hardware error detected
 .
9
 CIU internal microprogram error detected
 .
10
 Unused, should never be used
 .
11:15
 % 0 no data complete (no error)
 % 1 data transfer complete (no error)
 % 2 write ended and data not sent (retry)
 % 3 CLB underrun (retry)
 % 4 invalid CLB frame A field (ABORT)
 % 5 CLB frame less than two bytes long (ABORT)
 % 6 invalid CLB frame C field (ABORT)
 % 7 FCS error on incoming CLB frame (param retry)
 %10 CLB received and aborted frame (param retry)
 %11 CLB receiver underrun (param retry)
 %12 incoming CLB bits not modulo 256 (param retry)
 %13 CLB output WAK timeout (param retry)
 %14 CLB input enable WAK timeout (OUTPUT)
 %15 FLAK timeout (clear retry)
 %16 CLIP/BOB protocol violation (clear retry)
 %17 reserved--should not happen (clear retry)
 %20 LOCS address out of range (ABORT)
 %21 LOCS block exceeds end of RAM (ABORT)
 %22 LOCS block sizes do not match (ABORT)
 %23 LOCS block invalid format (ABORT)
 %24 LOCS block bad checksum (ABORT)
 %25 execution address invalid (ABORT)
 %26 start execution issued and CIU
 not loaded (ABORT)
 %27 invalid EIO command (ABORT)
 %30 invalid EIO parameter word (ABORT)
 %31 invalid EIO command for unit used (ABORT)
 %32 invalid NVRAM program (ABORT)
 %33 reserved--should not happen (ABORT)
 %34 reserved--should not happen (ABORT)
 %35 reserved--should not happen (ABORT)
 %36 reserved--should not happen (ABORT)
 %37 reserved--should not happen (ABORT)
 The values of 
param 1
, 
param 2
, and 
param 3
 are always 0. They
 are meaningless for the AM3270 subsystem.
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