Patch #1 to Frequently-asked Questions about the UNIX-PC/3b1 (1.2)
Andy Heffernan
ahh at glyph.kingston.ny.us
Thu May 2 14:51:59 AEST 1991
I've decided that the best way to handle short-term updates
to the FAQ-list is through patches.
The full list will be posted regularly, just not monthly.
These changes are based on the list posted last month.
If you missed it (depending on your expire schedule, it
may well be gone now), instructions on obtaining the base version
for this patch should be forthcoming shortly.
#! /bin/sh
# This is a shell archive. Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file". To overwrite existing
# files, type "sh file -c". You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g.. If this archive is complete, you
# will see the following message at the end:
# "End of shell archive."
# Contents: patch1
# Wrapped by ahh at glyph on Thu May 2 00:48:58 1991
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'patch1' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'patch1'\"
else
echo shar: Extracting \"'patch1'\" \(9856 characters\)
sed "s/^X//" >'patch1' <<'END_OF_FILE'
XPrereq: 1.2
X*** 3b1-faq.old Mon Apr 1 18:16:00 1991
X--- 3b1-faq Thu May 2 00:00:14 1991
X***************
X*** 3,9 ****
X as well as some frequent problems and useful hints with them
X ------------------------------------------------------------------
X
X! [$Header: /u/ahh/doc/RCS/3b1-faq,v 1.2 91/04/01 18:16:55 ahh Exp $]
X Send updates to 3b1-faq at glyph.kingston.ny.us.
X
X This article contains answers to the following questions:
X--- 3,9 ----
X as well as some frequent problems and useful hints with them
X ------------------------------------------------------------------
X
X! [$Header: /u/ahh/doc/RCS/3b1-faq,v 1.2.1.1 91/05/01 23:57:29 ahh Exp $]
X Send updates to 3b1-faq at glyph.kingston.ny.us.
X
X This article contains answers to the following questions:
X***************
X*** 173,232 ****
X
X 4) How do I open the case? How do I get to the motherboard (for the
X suggested preventive cleaning out of the "dust bunnies")?
X
X! The obvious screws on the bottom allow either removal of the top of
X! the plastic case or removal of the plastic case from the metal base.
X! Different screws release the plastic case or only the top (the part
X! above the keyboard storage area). Read the following several paragraphs
X! before removing anything other than the first step: unplug everything
X! from the back. (Oh, yeah: "No user serviceable parts inside" -- but
X! that all depends on the user!)
X!
X! First find the keyboard retainer posts (they hold the keyboard to the
X! base--one is next to the socket for the keyboard plug). Note the seam
X! around the top of the retainer posts. Remove the covers from the posts,
X! and you'll find a screw inside each. Remove those screws before
X! removing the screws on the bottom of the machine.
X!
X! When removing the top of the plastic case, there are two or three
X! plastic hook-and-tab catches in the front of the machine, to the right
X! of the floppy drive. The top of the case must be moved outward slightly
X! (usually with a screwdriver or finger pressure) along the joint to the
X! right of the floppy drive in order to release the catches. This exposes
X! only the floppy drive, the hard disk (underneath the shielding) and
X! power supply.
X!
X! The three screws in the front of the motherboard shielding should be
X! removed (if you want to expose the motherboard), and then remove the
X! screw holding the 10-pin video cable from the monitor (left side of the
X! motherboard shielding). The video connector can be removed from the
X! left side of the motherboard. Then remove the ribbon-like cable that
X! connects the motherboard to the power supply (on the right side of
X! the motherboard). After that the metal shielding can be lifted
X! and slid along the tracks and then flipped up or removed. This exposes
X! the motherboard. If you need to remove the motherboard shielding
X! completely and the monitor assembly, you need to disconnect the floppy
X! and hard disk cables from the motherboard (note the direction of the
X! connectors, and when replacing them be very sure that the 20-pin
X! and 34-pin connectors are seated correctly on the associated pins).
X! If you have a PC7300 power supply, and motherboard, you're floppy
X! drive power cable might be connected, as well, to the motherboard.
X! To remove the whole assembly, in that case, you'll need to remove
X! the power connector from the back of the floppy drive as well.
X!
X! *** BE VERY CAREFUL WHEN EXPOSING ANY COMPONENT OF THE UNIX PC, THERE
X! *** ARE MANY STATIC SENSITIVE COMPONENTS, PROPERLY GROUND YOURSELF
X! *** BEFORE POKING AROUND INSIDE!
X!
X! Be extra careful when placing the top of the UNIX PC/3B1 back on the
X! machine, a common cause for the machine not powering up after the cover
X! is replaced is the 120VAC connectors (brown and blue wires crimped on)
X! have fallen off the power input. Make sure they are crimped on tightly
X! before closing the case. Also be careful of the green ground wire, it
X! has a tendency of getting caught in the fan blades (causing the fan not
X! to start spinning when the machine is turned on) or caught in the case
X! itself. Be sure everything is working (including the fan) when you
X! close the case and before you fasten the 4 screws.
X
X
X 5) How can I put in a larger hard disk drive? Will this increase the speed
X--- 173,238 ----
X
X 4) How do I open the case? How do I get to the motherboard (for the
X suggested preventive cleaning out of the "dust bunnies")?
X+ (Courtesy of Norman Yarvin:)
X
X! Three sets of screws hold the case together. The first set consists of
X! two screws underneath the keyboard retainer posts, and three screws in
X! the rear panel. (The keyboard retainer posts hold the keyboard to the
X! base--one is next to the socket for the keyboard plug. Note the seam
X! around the top of the retainer posts. Remove the covers from the posts,
X! and you'll find a screw inside each.)
X!
X! When this set of screws is removed, the top (plastic) part of the case
X! is attached to the bottom only by some cables, which have enough slack
X! to let you take the top of the case off, tilt it backward, and rest it
X! on its rear behind the machine. However, this is quite a difficult task.
X! This is because it is hard to get the very front of the case up; the
X! plastic is shaped in such a way as to catch on to the metal bottom
X! somewhere. A bit of wrestling with the case is usually necessary here,
X! and some people prefer to take the top part of the top part off (the
X! next paragraph) before taking off the bottom part of the top part.
X!
X! The second set of screws holds the top part of the case together. It
X! consists of six screws, pointing upwards, which are found under the
X! overhang of the case. The only time they really need to be removed is
X! when replacing the fan. In addition to these screws, two or three
X! plastic hook-and-tab latches in the front of the machine need to be
X! released. The top of the case must be moved outward slightly (usually
X! with a screwdriver or finger pressure) along the joint to the right of
X! the floppy drive in order to release the catches.
X!
X! Taking off the top of the case exposes only the floppy drive, the hard
X! disk (underneath shielding) and the power supply. To get to the
X! motherboard, you then have to unscrew the third set of screws -- three
X! screws at the very front of the machine. The two latches on either side
X! of the motherboard cover become obvious when one tries to lift up the
X! panel, and are easily released. The motherboard cover pivots at the
X! rear; it can be lifted up. To lift it up more than an inch, the power
X! supply cable and the 10-pin video cable must be unplugged. After that
X! the metal shielding can be lifted and slid along the tracks and then
X! flipped up or removed. This exposes the motherboard. If you need to
X! remove the motherboard shielding completely and the monitor assembly,
X! you need to disconnect the floppy and hard disk cables from the
X! motherboard (note the direction of the connectors, and when replacing
X! them be very sure that the 20-pin and 34-pin connectors are seated
X! correctly on the associated pins). If you have a PC7300 power supply
X! and motherboard, your floppy drive power cable might also be connected
X! to the motherboard. To remove the whole assembly, in that case, you'll
X! need to remove the power connector from the back of the floppy drive as
X! well.
X!
X! Be careful when putting the top of the Unix PC/3B1 back on; a common
X! cause for the machine not powering up after the cover is replaced is the
X! 120VAC connectors (brown and blue wires crimped on) falling off the
X! power input, or being pulled off by the hard drive as the case is
X! closed. The green ground wire has a tendency to get caught in the fan
X! blades (causing the fan not to start spinning when the machine is turned
X! on) or caught in the case itself. Check that the fan is working after
X! closing the case.
X!
X! As always, use your head. Be careful when exposing any component of the
X! Unix PC. There are many static sensitive components; ground yourself
X! before poking around inside.
X
X
X 5) How can I put in a larger hard disk drive? Will this increase the speed
X***************
X*** 1547,1553 ****
X state after leaving. This state is characterized by each press
X of the ESC key injecting two 0x1b characters into the input stream.
X This generally doesn't help anybody -- vi beeps too much, emacs
X! is unusable, etc. The fix is to issue to following ioctl:
X
X #include <sys/window.h>
X ioctl(0, WIOCSESC, 0); /* turn off double-esc */
X--- 1553,1559 ----
X state after leaving. This state is characterized by each press
X of the ESC key injecting two 0x1b characters into the input stream.
X This generally doesn't help anybody -- vi beeps too much, emacs
X! is unusable, etc. The fix is to issue the following ioctl:
X
X #include <sys/window.h>
X ioctl(0, WIOCSESC, 0); /* turn off double-esc */
X***************
X*** 1586,1591 ****
X--- 1592,1598 ----
X Rob Stampfli <...!osu-cis!n8emr!kd8wk!res>
X Lenny Tropiano <lenny at icus.ICUS.COM>
X Craig Votava <cmv at ihlpf.att.com>
X+ Norman Yarvin <yarvin-norman at cs.yale.edu>
X
X All the people who were kind enough to make suggestions, additions,
X and corrections -- the list is a bit too long to include here.
END_OF_FILE
if test 9856 -ne `wc -c <'patch1'`; then
echo shar: \"'patch1'\" unpacked with wrong size!
fi
# end of 'patch1'
fi
echo shar: End of shell archive.
exit 0
--
-------------------------------------------------------------------------
Andy Heffernan $BJ8;z(J uunet!glyph!ahh
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