[pups] 2.11BSD boot hangs.
cdl at mpl.ucsd.edu
Wed Feb 28 04:27:56 AEST 2001
> From owner-pups at minnie.cs.adfa.edu.au Mon Feb 26 13:32 PST 2001
> From: jkunz at unixag-kl.fh-kl.de
> Date: Mon, 26 Feb 2001 22:15:52 +0100 (CET)
> Subject: Re: [pups] 2.11BSD boot hangs.
> To: sms at moe.2bsd.com
> cc: pups at minnie.cs.adfa.edu.au
> >> System configuration:
> >> 11/73 (M8192), one with FP accel. or one without. (Jumpers W1..W6 in,
> >> W7..W9 out, so that the CPU enters ODT at power up.)
> > There is a jumper (I forget which one) that enables/disables the
> > 'halt' instruction.
> BINGO! Pulling W5 solved the problem. But then I seted it again to
> double check. (I changed location today and took only the cards and
> disk with me.) In the "new" BA23 the system runs even with the W5
> jumper installed. Then I noticed the different setting of the front
> panel DIP swich. The upper switch is off and the lower on. The switches
> of the other cabinet are both on. If I boot the machine with W5
> installed and the upper switch on it hangs. It continues to run
> immediately if it is switched off. What is the purpose of this
Quote from _Microcomputer Products Handbook_ EB26078 41/85 (DEC)
. . .
The 2-position linetime clock (LTC) switch (switch 1) is used to enable
or disable the LTC function. Setting switch 1 ON enables the LTC to
function under software control. Setting switch 1 to the OFF position
disables the LTC function. The other 2-position switch (switch 2) is
Note (by me) this refers to microPDP usage of the BA23. The LTC is not
used by the microVAX which could occupy the same box.
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