[Simh] TOPS-20 4.1 BUGHLT

[Timothe Litt]

On 10-May-15 13:07, Cory Smelosky wrote:
> Hey,
>
> Trying to figure out if this is an issue with the install or an
> obscure SIMH bug.
>
> PDP-10 simulator V4.0-0 Beta        git commit id: 3b8c318b
> Listening on port 2020
>
> BOOT>
>
>
> [PS MOUNTED]
>
> SETSPD: TERMINAL 1-40 SPEED 200
>
> System restarting, wait...?INVALID CHARACTER IN NUMBER
> ENTER CURRENT DATE AND TIME: 10-MAY-2015 13:02
>
> YOU HAVE ENTERED SUNDAY, 10-MAY-2015 1:02PM,
>  IS THIS CORRECT (Y,N) Y
> WHY RELOAD? OPR
> RUN CHECKD? N
>
> RUNNING DDMP
>
>
> SYSJOB 5(23) STARTED AT 10-MAY-2015 1302
> RUN SYS:ORION
> RUN SYS:QUASAR
> RUN SYS:MOUNTR
> RUN SYS:INFO
> RUN SYS:MAILER
> RUN SYS:MAPPER
> RUN SYS:LPTSPL
> RUN SYS:LPTSPL
> RUN SYS:CDRIVE
> RUN SYS:SPRINT
> JOB 0 /LOG OPERATOR XX OPERATOR
> ENA
> ^ESET LOGIN PSEUDO
> ^ESET LOGIN CONSOLE
> ^ESET OPERATOR
> PTYCON
> GET SYSTEM:PTYCON.ATO
> /
> JOB 1 /LOG OPERATOR XX OPERATOR
> ENA
> RUN SYS:BATCON
> /
> SJ  1: @LOG OPERATOR OPERATOR
> SJ  0: @LOG OPERATOR OPERATOR
>
> **********
> *BUGHLT "ILMNRF" AT 10-May-2015 13:
> *JOB: 000000000002, USER: OPERATOR
> *ADDITIONAL DATA: 001000746144, 304000000000, 000000537375
> **********
>
> Config:
>
> set cpu idle
> set cpu tops-20
> at rp0 tops20-ps-rp06-1.dsk
> at rp1 tops20-ps-rp06-2.dsk
> at rp2 tsu.dsk
> at dz0 2020
> set tim y2k
> set console wru=6
> boot rp0
>
> I have applied the TSU01 4.1 update.
>
> Any ideas?  It worked fine until I tried to build kermit.
This is the generic illegal memory reference in the monitor for
TOPS-20.  Could be a reference to an unmapped page; a stray pointer, or
commonly a missing erjmp after a potentially unmapped reference.  There
were lots of patches for various cases, but there's probably not a 'last
bug'.

The additional data is the pagefail word, flags and pc.

The only way to track it down is to get a crash dump and dig in.  (You
might get a clue if you look at the PC with MDDT...)

You might also get a clue if you run spear on the error log.


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