Hi.
On 2020-02-12 17:33, Henk Gooijen wrote:
Thanks for responses, I learned a few things!
[...]
Always fun to learn more things... :-)
My current implementation turns on the FAULT lamp for several reasons.
- for the RK11 errors (so I need to check and somewhat improve that),
although the errors are not likely to occur in SIMH, unless you are
programming access to the registers directly and make a mistake ...
But I think it be a mistake to source the error lamp from that.
- if the drive (or software!) sets the drive to "read-only" (thus the
WT-PROT lamp goes on), and you do some write action, for example, try
to delete a file, the FAULT lamp goes on.
That sounds just plain wrong. That is not a fault at all. That just
fails. You get an error in the software, but the drive does not indicate
anything.
Toggling the WT-PROT switch or (RT11 command) .SET RK0 LOCKED will
turn on the WT-PROT lamp. Toggling again or .SET RK0 WRITEENABLE will
turn off the WT-PROT lamp.
From software you cannot remove the write protect. That can only be
done through the physical switch.
The software can only turn on write protect. It's not a toggle.
- according to RK11/RK05 documentation, toggling the WT-PROT or the
LOAD/RUN switch (to RUN) will turn off the FAULT lamp.
I can't believe that playing with the write protect switch would have
any affect on the fault lamp. I think only the load/run switch would do
that.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: [email protected] || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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