On Tue, Jun 23, 2015 at 7:06 PM, Henry Bent <[email protected]> wrote: > Out of curiosity I tried Ultrix 4.3 and 4.5 on the /750, both with genvmunix > and a custom kernel, and both showed the problem. Whatever the issue here > is, it appears to never have been fixed. I tried disabling just about every > device I could save for the disk, and I still got a panic every time. The > only thing I haven't yet tried is using a different disk controller (than > the UDA50).
Definitely try a different disk. UNIX device drivers do not use the hardware the same way that VMS drivers do. I helped debug the Simh RP03 driver long ago because it wouldn't fully boot 2.9BSD (long story short is that it was because the BSD driver wrote to a read-only register to initiate an interrupt for device probing). I've also run into issues with 4.3BSD not booting an 11/730 with RB80 (I did narrow it down to specific lines of code in the rb.c driver but haven't figured out what's not happening right. It's *very* early in the boot sequence that things go off the rails, so it wasn't too hard to trace in the code). > Interestingly, Ultrix 4.0 will boot on a /730 if you make a custom kernel > (genvmunix is too big). I didint' try 4.3 or 4.5. Huh. I haven't tried that. Interesting. Which disk? UDA50 or the IDC + RB80? (DU driver vs DQ driver in VMS terms) -ethan _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
