User`s guide

Error Messages

The error messages issued by the KA52/53/54 ﬁrmware fall into three

categories: halt code messages, VMB error messages, and console messages.

G.1 Machine Check Register Dump

Some error conditions, such as machine check, generate an error summary

nonexistent memory location results in the following display:

>>>e/p/l 20000000

MESR=00006000 MEAR=08406010 MMCDSR=01111000 MOAMR=00000000

CESR=80000200 CMCDSR=0000C108 CSEAR1=00000000 CSEAR2=00000000

CIOEAR1=00000000 CIOEAR2=00000000 CNEAR=00000000 ICSR=00000001

PCSTS=FFFFF800 PCADR=FFFFFFF8 TBSTS=C00000E0 TBADR=F5755754

NESTS=00000000 NEOADR=E014066C NEOCMD=8000F005 NEICMD=000003FF

NEDATHI=FFFFFFFF NEDATLO=FF7F9FFF CEFSTS=0001920A CEFADR=E0000000

BCETSTS=000003E0 BCETIDX=FFFFFFE0 BCETAG=FFFFFE00 BCEDSTS=00000F00

BCEDIDX=001FFFF8 BCEDECC=00000000 CBTCR=00004000 DSER=00000080

QBEAR=00000000 DEAR=00000000 IPCR0=0000 ECR=0000008A

SCSICSR4=00 SCSICSR6=C0 SCSICSR5=00

?7D MACHINE CHECK 80060000 00000000 20048C68 20048C59 20048C55 40110080

>>>

G.2 Halt Code Messages

Except on power-up, which is not treated as an error condition, the following

halt messages are issued by the ﬁrmware whenever the processor halts

(Table G–1).

For example, if the processor encounters a HALT instruction while in kernel

mode, the processor halts and the ﬁrmware displays the following before

entering console I/O mode:

?06 HLT INST

PC = 800050D3

Error Messages G–1