[its-hackers] Time standing still
lars at nocrew.org
Tue Apr 6 13:29:19 CEST 2021
Paul Svensson wrote:
> The clock on SV has stopped running.
> I can set it with PDSET, but it stays stuck to whatever I set it to.
> Where should I look for the problem ?
I believe you are running KLH10 so it's a KS10. Checking ITS sources I
see date and time should come from GPDTIM in SYSTEM; TIME >, and it uses
the KS10 RDTIM instruction. You could try putting a breakpoint there.
Maybe this code has crossed a limit or overflow condition? What is that
RDTIM A ; Read clock into A!B
TLC A,1729. ; "A most interesting number"
TLNE A,-1 ; Does the clock look like it has been set?
JRST GPDTM2 ; Must have been reset
DIVI A,KSFREQ ; Convert to 60ths
SUB A,PDTIME ; Subtract offset
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