From ebe938186da9c77d317de4b91ee8f5220c33f882 Mon Sep 17 00:00:00 2001 From: David Todd Date: Mon, 19 Jan 2026 17:33:51 -0500 Subject: [PATCH] Update how to change magtapes without reboot --- install-guides/Pi-Mac-install-guide.md | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/install-guides/Pi-Mac-install-guide.md b/install-guides/Pi-Mac-install-guide.md index b645c0f..f313d5b 100644 --- a/install-guides/Pi-Mac-install-guide.md +++ b/install-guides/Pi-Mac-install-guide.md @@ -571,6 +571,8 @@ To mount a virtual magtape for writing (e.g., for backing up), in `/DEC20/klt20. **where the file `Temp.tap` is non-existent.** klh10 won't let you write over an existing virtual tape file. `@ assign mta0:` after you've logged in and then run DUMPER. +It is possible to change tapes without rebooting TOPS-20 by halting the processor, giving the appropriate command, and continuing. See the example in the "DEVMOUNT" section of Harrenstien's `klh10/doc/cmdref.txt`. + ## Quirks You May Or May Not See These are some problems I've seen arise while running klh10 with Panda. @@ -586,8 +588,7 @@ These are some problems I've seen arise while running klh10 with Panda. ## Unresolved Issues -1. I have not been able to stop the klh10 program with CNTL-\\, use `devmount` to assign a different virtual tape to the drive, and continue. It's not clear from Harrenstien's documentation whether it should be possible. If you get it to work, please say how. -2. It appears to have been possible to run `/DEC20/klt20` without having root privileges by having set `dpni20` +s and owned by root, but that no longer works. If you find a solution, please say how. +1. It appears to have been possible to run `/DEC20/klt20` without having root privileges by having set `dpni20` +s and owned by root, but that no longer works. If you find a solution, please say how. ## Acknowldegement