Mattis -- thanks! I'll check this out in detail when I get home tonight and I'll give it a try.
Rich Sent from my iPhone On Mar 11, 2016, at 1:26 PM, Mattis Lind <mattisl...@gmail.com> wrote: >> >> SIMH has never directly supported mounting/attaching virtual TU58 devices. >> Altho the required serial interface >> is emulated (ie, a plain DL11 at 776500/300) the TU58 drive behind the >> serial interface has never been emulated. > I just tested the latest SimH from github and it is indeed possible to > enable tdc and attach an image file to the tdc0 device. I then booted into > RT11 from a DU-device and did INIT DD0: no problem. > Then I made a bootable DD image. I did even do a BOOT DD0: which gave me a > RT11-prompt. But booting from SimH failed on me. I am not sure why. > > MattisMacBook:BIN mattis$ ./pdp11 > PDP-11 simulator V4.0-0 Beta git commit id: 1b6f28a7 > sim> set tdc enable > sim> attach tdc0 rt11-dd.dsk > TDC: creating new file > TDC: buffering file in memory > sim> attach rq0 rt11v53-games.dsk > sim> b rq0 > > RT-11SJ V05.03 > > .init dd0: > DD0:/Initialize; Are you sure? Y > > .copy dd.sys dd0: > Files copied: > DK:DD.SYS to DD0:DD.SYS > **** Copying some files ***** > > > .copy rt11sj.sys dd0: > Files copied: > DK:RT11SJ.SYS to DD0:RT11SJ.SYS > > .copy/boot rt11sj.sys dd0: > .boot dd0: > > RT-11SJ V05.03 > > .dir > > DD .SYS 5P 20-Dec-85 TT .SYS 2P 20-Dec-85 > SWAP .SYS 27P 20-Dec-85 STARTS.COM 1P 20-Dec-85 > DIR .SAV 19P 20-Dec-85 DUP .SAV 47P 20-Dec-85 > DU .SYS 8P 20-Dec-85 RT11SJ.SYS 79P 20-Dec-85 > 8 Files, 188 Blocks > 316 Free blocks > > .boot du0: > > > RT-11SJ V05.03 > > . > > Simulation stopped, PC: 146414 (BCC 146446) > sim> exit > Goodbye > TDC: writing buffer to file > > PDP-11 simulator V4.0-0 Beta git commit id: 1b6f28a7 > sim> set tdc enable > sim> attach tdc0 rt11-dd.dsk > TDC: buffering file in memory > sim> b tdc0 > > > Trap stack push abort, PC: 000000 (WAIT) > sim> > > I have no idea why SimH is not able to boot from the simulated DD0: device. > The steps to make a bootable dd0: was exactly the same steps as to make a > bootable RK0: which works just fine. > > > Ersatz-11 on the other hand works fine with the same image: > > E11>assign tt1: dda: > E11>mount dda0: rt11v53_dd.dsk > E11>b tt1: > > RT-11SJ V05.03 > > .dir > > TT .SYS 2P 20-Dec-85 DD .SYS 5P 20-Dec-85 > RT11SJ.SYS 79P 20-Dec-85 SWAP .SYS 27P 20-Dec-85 > STARTS.COM 1P 20-Dec-85 DIR .SAV 19P 20-Dec-85 > RESORC.SAV 25P 20-Dec-85 > 7 Files, 158 Blocks > 346 Free blocks > > . > > > This is the image that boots in Ersatz-11 but not in SimH: > https://dl.dropboxusercontent.com/u/96935524/rt11v53_dd.dsk.gz > Since it boots on Ersatz-11 when set to 11/03 CPU it should work on the > real hardware. > > BTW. It not so that the LTC interrupt is enabled in your system? I have had > problem with that one. In certain cases it need to be disabled. If I > remember correctly I had problems booting RT11 from MSCP devices with LTC > enabled. > > /Mattis > > > >> Don >>
