Hi Wilm, On Saturday, December 15, 2018 at 3:45 AM, Wilm Boerhout wrote: > I'm trying to get my head around VAXELN and system time. > > Before I cry "Wolf" and accuse any innocent program(mer) of instruction > obstruction, I want to know how things are supposed to work here (i.e. > as on a real rtVAX with VAXELN) > > I have built a VAXELN system image and can download this into the simh > rtVAX. Whatever simh setting I use, the VAXELN system clock always > starts at 0, starting time after boot on 17-NOV-1858. I can set the time > manually, but it is not preserved across boot. Should it be? > > simh ini file: > > echo rtVAX-1000 > > set CPU diag=MIN 16M idle=ELN conhalt autoboot > set WTC time=STD > > set DZ disable > set LPT disable > set RL disable > set TS disable > set TQ disable > > att -e NVR /opt/ka620.nvr > > set RQ0 rd54 > att -e RQ0 /vdisk/VAXELN.vdisk > > set XQ type=DEQNA mac=08:00:2B:13:01:92 > att XQ TAP:tap0 > > set DEBUG /opt/ka620.debug > set WTC DEBUG > > boot > > contents of ka620.debug after booting and shutdown (well, no shutdown on > ELN, so ctrl/E) > > /opt/rtvax1000.ini-20> set DEBUG /opt/ka620.debug > Debug output to "/opt/ka620.debug" > Debug output to "/opt/ka620.debug" at Sat Dec 15 11:57:42 2018 > rtVAX1000 (KA620) simulator V4.0-0 Current git commit id: c2b45a26 > /opt/rtvax1000.ini-23> boot > Loading boot code from internal ka620.bin > DBG(146257)> WTC REG: wtc_rd(pa=0x200B801A [CSRD], data=0x80) VALID1 > > Simulation stopped, PC: 800066EA (TSTL 80000900) > sim> quit > Goodbye > NVR: writing buffer to file > Eth: closed tap0
From the debug log it is clear that, although the CSRD register was read and the time it contained was indicated as being VALID, no other references were made by the running system to anything that contained time data so it isn't surprising that the time is 0. Try running ELN with the MicroVAX3900 simulator and see if you get different behavior. - Mark _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
