I would take this as a hint to check / replace the fans, improve the airflow, and perhaps provide chilled air.
It could be worse at least you get an error message from the finest MSI and Am2911 bit slice controller Martin -----Original Message----- From: Charles Morris via cctalk [mailto:[email protected]] Sent: 13 June 2026 03:02 To: cctalk digest <[email protected]> Cc: Charles Morris <[email protected]> Subject: [cctalk] Looking for RLV12 card (DEC M8061) The RLV12 (RL02 drive controller) in my PDP-11/23+ has decided to quit working when it gets hot in the room. RT-11 won't boot, with an ERR 15 Controller Error. The defect may have become permanent, will have to check in the morning when everything's cool. The drives themselves are not indicating any faults, and both of them exhibit the same behavior on boot. Trying to rig up an emulator (or boot XXDP from the Teac 3.5" floppy) introduces a whole new set of hair-pullers. Since the RLV12 is so complex, I am tempted just to replace it, if one can be had... so does anyone have one they don't need? :) thanks Charles
