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Code Issues Releases Wiki Activity

Update how to change magtapes without reboot

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David Todd
2026-01-19 17:33:51 -05:00
committed by Rhialto The M.
parent 3b7bb665b5
commit ebe938186d
1 changed files with 3 additions and 2 deletions
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install-guides/Pi-Mac-install-guide.md
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@@ -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