31 Jan
2019
31 Jan
'19
12:51 p.m.
On Jan 31, 2019, at 12:26 PM, Bill Degnan via cctech
<cctech at classiccmp.org> wrote:
My PDP 11/40 suddenly lost it's ability to boot RL02 disks except the XXDP
disk. I have two drives, both boot up an XXDP (I have more than one) just
fine, but any formerly-working RT-11 (v 5, 5.1, 5.3) no longer boots, it
just hangs.
I'd check things related to interrupts.
My experience has been that XXDP monitors (at least the earlier ones) use polling, and can
be boot and run even when disk controller interrupts aren't working because of this.
--FritzM.